Update build.yml

.github/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Checkout 1.5.2+ branch
         uses: actions/checkout@v4
         with:
-          ref: 1.5.2+
+          ref: v1.5.2+
 
       - name: Remove old contents from webroot folder
         run: |