Ensure TAG_NAME env is set

Author: mallardduck

.github/workflows/release.yml

@@ -45,9 +45,12 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name : Make test helm chart
+        env:
+          TAG_NAME: ${{ github.ref_name }}
         run: TAG=$TAG_NAME make package-helm
       - name: Add test helm chart to release
         env:
+          TAG_NAME: ${{ github.ref_name }}
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           gh release upload "$TAG_NAME" "./build/charts/rancher-kubectl-test-${TAG_NAME}.tgz"