chore(deps): bump actions/setup-python from 4 to 5

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 4 to 5.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/autoassign.yml

@@ -17,7 +17,7 @@ jobs:
       - name: checkout repo content
         uses: actions/checkout@v4 # checkout the repository content
       - name: setup python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.10' # install the python version needed
       - name: install python packages

.github/workflows/readme-update.yml

@@ -22,7 +22,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.8"
 

.github/workflows/wordpress-plugins-update.yml

@@ -14,7 +14,7 @@ jobs:
           fetch-depth: 0 # otherwise, you will failed to push refs to dest repo
 
       - name: Install Python3
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.10"
       - run: |