fix syntax error

Author: ha1t

.github/workflows/main.yml

@@ -1,15 +1,15 @@
 - name: OSKAR-phpstan
   uses: OskarStark/phpstan-ga@0.11.16
 
-on: [push, pull_request]
-name: Test
-jobs:
-  phpstan:
-    name: PHPStan
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@master
-    - name: PHPStan
-      uses: docker://oskarstark/phpstan-ga
-      with:
-        args: analyse lib/
+  on: [push, pull_request]
+  name: Test
+  jobs:
+    phpstan:
+      name: PHPStan
+      runs-on: ubuntu-latest
+      steps:
+      - uses: actions/checkout@master
+      - name: PHPStan
+        uses: docker://oskarstark/phpstan-ga
+        with:
+          args: analyse lib/