Fix runtime-paths input using YAML sequence

Co-authored-by: per1234 <[email protected]>

Author: pennam

.github/workflows/unit-tests.yml

@@ -27,7 +27,8 @@ jobs:
 
       - uses: arduino/cpp-test-action@main
         with:
-          runtime-paths: extras/test/build/bin/testArduinoIoTCloud
+          runtime-paths: |
+            - extras/test/build/bin/testArduinoIoTCloud
           coverage-exclude-paths: |
             - '*/extras/test/*'
             - '/usr/*'