ci: Update ctest arguments to report test output on failure

Author: jcfr

.github/workflows/ci.yml

@@ -56,7 +56,7 @@ jobs:
 
     - name: Tests
       run: |
-        ctest --test-dir build -C Release --output-junit test-results.xml
+        ctest --test-dir build -C Release --output-on-failure --output-junit test-results.xml
 
     - name: Publish Test Report
       uses: mikepenz/[email protected]