chore(CI): Adjust testing matrix for Nextcloud 30 on main

Signed-off-by: Joas Schilling <[email protected]>

.github/workflows/phpunit.yml

@@ -23,6 +23,8 @@ jobs:
         include:
           - php-versions: '8.1'
             server-versions: 'master'
+          - php-versions: '8.1'
+            server-versions: 'stable30'
         databases: ['sqlite']
 
     name: php${{ matrix.php-versions }}-${{ matrix.databases }}-${{ matrix.server-versions }}
@@ -233,4 +235,4 @@ jobs:
       - name : Mysql test status
         run: if ${{ needs.mysql.result != 'success' && needs.mysql.result != 'skipped' }}; then exit 1; fi
       - name : Pgsql test status
-        run: if ${{ needs.pgsql.result != 'success' && needs.pgsql.result != 'skipped' }}; then exit 1; fi    
+        run: if ${{ needs.pgsql.result != 'success' && needs.pgsql.result != 'skipped' }}; then exit 1; fi