Add git fetch and error handling to Go tag step

Co-authored-by: friggeri <106686+friggeri@users.noreply.github.com>

Author: Copilot

.github/workflows/publish.yml

@@ -207,8 +207,10 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Tag Go SDK submodule
         run: |
+          set -e
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
+          git fetch --tags
           TAG_NAME="go/v${{ needs.version.outputs.version }}"
           if git rev-parse "$TAG_NAME" >/dev/null 2>&1; then
             echo "Tag $TAG_NAME already exists, skipping"