Fix continue-on-error evaluation in unit tests

- Change from matrix.experimental to matrix.experimental == true
- Prevents 'Unexpected value' error when experimental is undefined
- Handles both defined (true/false) and undefined cases correctly

Author: ajaydsouza

.github/workflows/unit-tests.yml

@@ -38,9 +38,10 @@ jobs:
           - php: '8.4'
             wp: 'latest'
             experimental: true
+
     name: "PHP ${{ matrix.php }} - WP ${{ matrix.wp }}"
 
-    continue-on-error: ${{ matrix.experimental }}
+    continue-on-error: ${{ matrix.experimental == true }}
 
     services:
       mysql: