Use swiftly version that supports macOS

Author: klaaspieter

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
-    - uses: vapor/swiftly-action@v0.2
+    - uses: sersoft-gmbh/fork-swiftly-action:feature/macos-support
 
     - name: Cache Swift Package Manager
       uses: actions/cache@v3