Replace compile-examples@main with compile-examples@v1. (#271)

The released actions are guaranteed to work, while the version in main can - sometimes - break.

.github/workflows/compile-examples.yml

@@ -55,7 +55,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Compile examples
-        uses: arduino/compile-sketches@main
+        uses: arduino/compile-sketches@v1
         with:
           fqbn: ${{ matrix.board.fqbn }}
           platforms: ${{ matrix.board.platforms }}