ci: upgrade macOS runners to macOS 12

.github/workflows/release.yaml

@@ -268,7 +268,7 @@ jobs:
     ## The environments can be seen in https://github.com/haskell/haskell-language-server/settings/environments
     ## assuming you have the proper permissions.
     environment: CI
-    runs-on: macOS-11
+    runs-on: macOS-12
     env:
       MACOSX_DEPLOYMENT_TARGET: 10.13
       AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
@@ -576,7 +576,7 @@ jobs:
 
   bindist-mac-x86_64:
     name: Tar bindists (Mac x86_64)
-    runs-on: macOS-11
+    runs-on: macOS-12
     needs: ["build-mac-x86_64"]
     env:
       TARBALL_EXT: tar.xz
@@ -837,7 +837,7 @@ jobs:
 
   test-mac-x86_64:
     name: Test binary (Mac x86_64)
-    runs-on: macOS-11
+    runs-on: macOS-12
     needs: ["bindist-mac-x86_64"]
     env:
       MACOSX_DEPLOYMENT_TARGET: 10.13