fix: do not block pipeline with manual job

Signed-off-by: Bart Jaskulski <bjaskulski@protonmail.com>

includes/tests/unit.yml

@@ -21,6 +21,7 @@ test:unit:
     - exists:
         - phpunit-unit.xml
       when: manual
+      allow_failure: true
   coverage: '/^\s*Lines:\s*\d+.\d+\%/'
   artifacts:
     paths: