Use vapor/swiftly-action for ubuntu builds

Author: carson-katri

.github/workflows/swift.yml

@@ -7,13 +7,13 @@ jobs:
     name: Swift ${{ matrix.swift }} on ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
         swift: ["6.1"]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: swift-actions/setup-swift@v2
+      - uses: vapor/swiftly-action@v0.2
         with:
-          swift-version: ${{ matrix.swift }}
+          toolchain: ${{ matrix.swift }}
       - uses: actions/checkout@v4
         with:
           submodules: true