fixed syntax

.github/workflows/staging_pipeline.yml

@@ -14,7 +14,7 @@ defaults:
 jobs:
   test:
     name: Test
-    if: ! github.event.pull_request.draft
+    if: '!github.event.pull_request.draft'
     runs-on: ubuntu-latest
 
     services:
@@ -73,7 +73,7 @@ jobs:
 
   lint:
     name: Lint
-    if: ! github.event.pull_request.draft
+    if: '!github.event.pull_request.draft'
     runs-on: ubuntu-latest
 
     steps:
@@ -101,7 +101,7 @@ jobs:
 
   audit:
     name: Audit dependencies
-    if: ! github.event.pull_request.draft
+    if: '!github.event.pull_request.draft'
     runs-on: ubuntu-latest
 
     steps: