Upgraded to swift-actions/setup-swift/v2.

Author: wadetregaskis

.github/workflows/swift.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: swift-actions/setup-swift@v1
+    - uses: swift-actions/setup-swift@v2
     - uses: actions/checkout@v3
     - name: Build
       run: swift build