ci: fix syntax error

Author: albinhallen

.github/workflows/ci.yml

@@ -35,5 +35,5 @@ jobs:
         run: vendor/bin/phpstan --memory-limit=512M analyze
 
       - name: Unit testing
-        run: vendor/bin/phpunit --migrate-configuration
-        run: vendor/bin/phpunit
+      - run: vendor/bin/phpunit --migrate-configuration
+      - run: vendor/bin/phpunit