CI: Use ubuntu-22.04 rather than ubuntu-latest (ubuntu-20.04)

Use ubuntu-22.04 for the CI tests rather than ubuntu-latest,
which is currently ubuntu-20.04.

.github/workflows/autobump.yml

@@ -845,7 +845,7 @@ permissions:
 jobs:
   autobump:
     if: github.repository == 'Homebrew/homebrew-core'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     container:
       image: ghcr.io/homebrew/ubuntu22.04:master
     steps:

.github/workflows/autopublish.yml

@@ -19,7 +19,7 @@ permissions:
 jobs:
   autopublish:
     if: github.repository == 'Homebrew/homebrew-core'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Set up Homebrew
         id: set-up-homebrew

.github/workflows/dispatch-build-bottle.yml

@@ -31,7 +31,7 @@ permissions:
 
 jobs:
   prepare:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     outputs:
       runners: ${{steps.runner-matrix.outputs.result}}
     steps:
@@ -221,7 +221,7 @@ jobs:
           bot_body: ":x: Bottle request for ${{github.event.inputs.formula}} [failed](${{github.event.repository.html_url}}/actions/runs/${{github.run_id}})."
           bot: BrewTestBot
   upload:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: bottle
     if: github.event.inputs.upload
     env:

.github/workflows/dispatch-rebottle.yml

@@ -32,7 +32,7 @@ env:
 
 jobs:
   setup:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     container:
       image: ghcr.io/homebrew/ubuntu22.04:master
     outputs:
@@ -168,7 +168,7 @@ jobs:
       issues: write # for Homebrew/actions/post-comment
       contents: write # for Homebrew/actions/git-try-push
       packages: write # for brew pr-upload
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: bottle
     if: github.event.inputs.upload
     env:

.github/workflows/publish-commit-bottles.yml

@@ -23,7 +23,7 @@ permissions:
 
 jobs:
   upload:
-    runs-on: ${{github.event.inputs.self_hosted == 'true' && 'linux-self-hosted-1' || 'ubuntu-latest'}}
+    runs-on: ${{github.event.inputs.self_hosted == 'true' && 'linux-self-hosted-1' || 'ubuntu-22.04'}}
     container: ${{github.event.inputs.self_hosted == 'true' && fromJson('{"image":"ghcr.io/homebrew/ubuntu22.04:master","options":"--user=linuxbrew -e GITHUB_ACTIONS_HOMEBREW_SELF_HOSTED"}') || ''}}
     steps:
       - name: Post comment once started

.github/workflows/recreate-linux-runners.yml

@@ -16,7 +16,7 @@ permissions:
 jobs:
   recreate:
     if: github.repository == 'Homebrew/homebrew-core'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     env:
       # TODO agree on one label for all runners
       RUNNER_LABEL: TODO

.github/workflows/remove-disabled-formulae.yml

@@ -18,7 +18,7 @@ permissions:
 jobs:
   remove-disabled-formulae:
     if: startsWith(github.repository, 'Homebrew/')
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Set up Homebrew
         id: set-up-homebrew

.github/workflows/tests.yml

@@ -22,7 +22,7 @@ permissions:
 jobs:
   tap_syntax:
     if: github.repository == 'Homebrew/homebrew-core'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     container:
       image: ghcr.io/homebrew/ubuntu22.04:master
     env:
@@ -46,7 +46,7 @@ jobs:
     permissions:
       pull-requests: read
     if: github.event_name == 'pull_request' && github.repository == 'Homebrew/homebrew-core'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: tap_syntax
     outputs:
       syntax-only: ${{ steps.check-labels.outputs.syntax-only }}
@@ -85,7 +85,7 @@ jobs:
             if (label_names.includes('CI-linux-self-hosted')) {
               core.setOutput('linux-runner', 'linux-self-hosted-1')
             } else {
-              core.setOutput('linux-runner', 'ubuntu-latest')
+              core.setOutput('linux-runner', 'ubuntu-22.04')
             }
 
             if (label_names.includes('CI-no-fail-fast')) {

.github/workflows/triage-issues.yml

@@ -29,7 +29,7 @@ jobs:
           contains(github.event.pull_request.labels.*.name, 'stale')
         )
       )
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Mark/Close Stale Issues and Pull Requests
         uses: actions/stale@v5
@@ -55,7 +55,7 @@ jobs:
           contains(github.event.pull_request.labels.*.name, 'stale')
         )
       )
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Mark/Close Stale `bump-formula-pr` and `bump-cask-pr` Pull Requests
         uses: actions/stale@v5
@@ -72,7 +72,7 @@ jobs:
 
   lock-threads:
     if: startsWith(github.repository, 'Homebrew/') && github.event_name != 'issue_comment'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Lock Outdated Threads
         uses: dessant/lock-threads@e460dfeb36e731f3aeb214be6b0c9a9d9a67eda6

.github/workflows/triage.yml

@@ -11,7 +11,7 @@ permissions:
 
 jobs:
   triage:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Check commit format
         uses: Homebrew/actions/check-commit-format@master

cmd/determine-rebottle-runners.rb

@@ -29,7 +29,7 @@ module Homebrew
     linux_runner = if timeout > 360
       "linux-self-hosted-1"
     else
-      "ubuntu-latest"
+      "ubuntu-22.04"
     end
     linux_runner_spec = {
       runner:    linux_runner,