Update CI to test against Swift 6.2

Author: marcprux

.github/workflows/test-action.yml

@@ -12,7 +12,7 @@ jobs:
       matrix:
         os: ['ubuntu-24.04', 'ubuntu-22.04', 'macos-13', 'macos-15']
         #swift-version: ['6.0', '6.1']
-        swift-version: ['6.0', '6.1', '6.1.1', 'nightly-6.2']
+        swift-version: ['6.0', '6.1', '6.1.1', '6.2']
         ndk-version: ['27', 'latest']
     steps:
       - name: Checkout Action
@@ -72,7 +72,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ['ubuntu-24.04', 'ubuntu-22.04', 'macos-13', 'macos-15']
-        swift-version: ['6.0', '6.1', 'nightly-6.2']
+        swift-version: ['6.0', '6.1', '6.2']
         ndk-version: ['27', 'latest']
     steps:
       - name: Checkout Action