fix variable setting

.github/workflows/ToolUpdate.yml

@@ -26,6 +26,9 @@ jobs:
         LATEST_VERSION=$(curl -s https://api.github.com/repos/FirelyTeam/firely-terminal-pipeline/releases/latest | jq -r .tag_name)
         echo "LATEST_VERSION=$LATEST_VERSION" >> $GITHUB_ENV
 
+    - name: Debug LATEST_VERSION
+      run: echo "LATEST_VERSION is $LATEST_VERSION"
+
     - name: Update PR template version
       run: |
         # Update the version in PR_Template_VersionUpgrade.md
@@ -49,7 +52,7 @@ jobs:
       uses: peter-evans/create-pull-request@v4
       with:
         commit-message: "Update dependency to version $LATEST_VERSION"
-        branch: update-dependency-$LATEST_VERSION
+        branch: update-dependency-${{ env.LATEST_VERSION }}
         title: "Update dependency to version $LATEST_VERSION"
         body: "This PR updates the dependency to version $LATEST_VERSION."
         labels: |