Update workflow: Move coverage to release branch

from miraheze/.github (miraheze/.github@007dbb3)

Author: Universal-Omega

.github/workflows/mediawiki-tests.yml

@@ -17,15 +17,15 @@ jobs:
             php: 8.1
             php-docker: 81
             composer-test: true
-            coverage: false
+            coverage: true
             experimental: false
 
           # Latest MediaWiki master - PHP 8.1
           - mw: 'master'
             php: 8.1
             php-docker: 81
             composer-test: false
-            coverage: true
+            coverage: false
             experimental: true
 
     with: