dhall: use `ghc@9.2` to build

Formula/dhall.rb

@@ -1,6 +1,8 @@
 class Dhall < Formula
   desc "Interpreter for the Dhall language"
   homepage "https://dhall-lang.org/"
+  # TODO: Switch `ghc@9.2` to `ghc` once cborg has a new release that supports
+  # ghc-prim 0.9.0. PR ref: https://github.com/well-typed/cborg/pull/304
   url "https://hackage.haskell.org/package/dhall-1.41.2/dhall-1.41.2.tar.gz"
   sha256 "6a9a026e698e5c1a1e103fcb376e8494615b03ef2450f0b6c5e6b43877cea592"
   license "BSD-3-Clause"
@@ -16,7 +18,7 @@ class Dhall < Formula
   end
 
   depends_on "cabal-install" => :build
-  depends_on "ghc" => :build
+  depends_on "ghc@9.2" => :build
 
   uses_from_macos "ncurses"
   uses_from_macos "zlib"