Use Swift 6.0 for now

Author: finestructure

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
         - uses: actions/checkout@v4
         - uses: swift-actions/setup-swift@v2
           with:
-            swift-version: "6.1.0"
+            swift-version: "6.0"
         - name: Echo Swift version
           run: swift --version
         - name: Check a Release build
@@ -32,7 +32,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: swift-actions/setup-swift@v2
         with:
-          swift-version: "6.1.0"
+          swift-version: "6.0"
       - name: Echo Swift version
         run: swift --version
       - name: Test