ci: fetch tags during checkout (#806)

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/806
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.com>
Co-authored-by: pat-s <patrick.schratz@gmail.com>
Co-committed-by: pat-s <patrick.schratz@gmail.com>

.gitea/workflows/changelog.yml

@@ -14,6 +14,8 @@ jobs:
         run: |
           apk add -q --update --no-cache nodejs curl jq sed
       - uses: actions/checkout@v4
+        with:
+          fetch-tags: true
       - name: Generate upcoming changelog
         run: |
           git sv rn -o changelog.md