Run CI tests against Swift 6.1 and nightly-6.2

Author: marcprux

.github/workflows/ci.yml

@@ -10,14 +10,20 @@ on:
     - cron:  '45 2,13 * * *'
 jobs:
   linux-android:
+    strategy:
+      fail-fast: false
+      matrix:
+        swift: ['6.1', 'nightly-6.2']
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v4
       - name: "Test Swift Package on Linux"
         run: swift test
       - name: "Test Swift Package on Android"
-        uses: skiptools/swift-android-action@v2
+        uses: skiptools/swift-android-action@main
+        with:
+          swift-version: ${{ matrix.swift }}
 
   macos-ios:
     runs-on: macos-latest