Move CDN ID to vars

Author: rafaljanicki

.github/workflows/developer.yml

@@ -58,7 +58,7 @@ jobs:
       env:
         DISTRIBUTION: ${{ vars.AWS_CLOUDFRONT_DISTRIBUTION }}
         PATHS: "/labs/* /developer/*"
-        AWS_REGION: ${{ vars.AWS_S3_REGION }}
+        AWS_REGION: ${{ secrets.AWS_S3_REGION }}
         AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
         AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}