Use the swift docker image to run format check.

See swift-actions/setup-swift#591 (comment)

.github/workflows/format-check.yml

@@ -22,6 +22,7 @@ jobs:
   build:
     name: Format check
     runs-on: ubuntu-latest
+    container: swift:5.8
     steps:
     - name: Checkout
       uses: actions/checkout@v3
@@ -35,11 +36,6 @@ jobs:
 
     - run: git config --global core.autocrlf input
 
-    - name: Setup swift
-      uses: slashmo/[email protected]
-      with:
-        version: 5.8
-
     - name: Swift version
       run: swift --version