Update gh-pages.yml

.github/workflows/gh-pages.yml

@@ -24,8 +24,7 @@ on:
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
-env:
-  BRANCH_REF: $(echo "$GITHUB_HEAD_REF/")
+
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
   # This workflow contains a single job called "build"
@@ -54,7 +53,7 @@ jobs:
             SUBPATH="v$TAG/" # note the trailing slash
             echo "Building for TAG: $SUBPATH"
           else
-            SUBPATH=$(echo "$GITHUB_REF") # "${GITHUB_HEAD_REF}/" # note the trailing slash
+            SUBPATH=$(echo "$GITHUB_REF" | sed "s/\/refs\/heads\///") # "${GITHUB_HEAD_REF}/" # note the trailing slash
             echo "Building for PR: $SUBPATH"
           fi
           echo "Publishing $SUBPATH"