Merge pull request #12 from ahoppen/fixed-format-version

Fix the version of swift-format being used in format check

Author: shahmishal

.github/workflows/soundness.yml

@@ -143,7 +143,7 @@ jobs:
     if: ${{ inputs.format_check_enabled }}
     runs-on: ubuntu-latest
     container:
-      image: swiftlang/swift:nightly-6.0-jammy
+      image: swift:6.0-jammy
     timeout-minutes: 10
     steps:
     - name: Checkout repository