chore: update draft release env set (#648)

Author: Anemy

.github/workflows/draft-release.yaml

@@ -64,8 +64,6 @@ jobs:
       - name: Validate release tag
         shell: bash
         run: |
-          RELEASE_TAG=${{ inputs.RELEASE_TAG }}
-
           if [ -z "${RELEASE_TAG}" ]; then
             echo "RELEASE_TAG is not set or is empty"
             exit 1