fix(ci): Add setup-xcode step to select Xcode 26.2

Author: philprime

.github/workflows/tests.yml

@@ -41,7 +41,11 @@ jobs:
             logfiles: raw-*-visionos.log
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
+
+      - uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: "26.2"
 
       - name: Run Tests
         run: make ${{ matrix.build.action }}