Refactor: Extract retry interval to variable in UI workflow

Author: sebastiangollob

.github/workflows/ui.yml

@@ -21,6 +21,7 @@ jobs:
       BROWSERSTACK_ACCESS_KEY: ${{ secrets.BROWSERSTACK_ACCESS_KEY }}
       BROWSERSTACK_DEVICES: |
         Google Pixel 9 Pro XL-15.0
+      RETRY_INTERVAL: 60
 
     steps:
       - uses: actions/checkout@v4
@@ -173,7 +174,7 @@ jobs:
               break
             fi
 
-            sleep 20
+            sleep $RETRY_INTERVAL
           done
 
           echo ""