Use build path containing spaces for sketch compilation "smoke tests"

Using a custom build path containing spaces for the sketch compilations done by the "Compile Examples" GitHub Actions
workflow will catch insufficient path quoting in the compilation patterns defined by the platform.

Author: per1234

.github/workflows/compile-examples.yml

@@ -126,6 +126,10 @@ jobs:
       - name: Compile examples
         uses: arduino/compile-sketches@v1
         with:
+          cli-compile-flags: |
+            # Use build path containing spaces to check for path quoting problems in compilation patterns
+            - --build-path
+            - ${{ runner.temp }}/path with spaces
           github-token: ${{ secrets.GITHUB_TOKEN }}
           fqbn: ${{ matrix.board.fqbn }}
           libraries: |