Fix the release issue template

GitHub complains about the missing about field.

Signed-off-by: Michi Mutsuzaki <[email protected]>

.github/ISSUE_TEMPLATE/release.md

@@ -1,5 +1,6 @@
 ---
 name: Release a new version of Hubble CLI from main branch
+about: A checklist for Hubble CLI release process
 title: 'vX.Y.Z release'
 ---
 
@@ -109,4 +110,4 @@ title: 'vX.Y.Z release'
 [Releases page]: https://github.com/cilium/hubble/releases
 [Cilium Slack #general channel]: https://cilium.slack.com/archives/C1MATJ5U5
 [*Releases* section of the `README.md`]: https://github.com/cilium/hubble/blob/main/README.md#releases
-[`Create a release` workflow]: https://github.com/cilium/hubble/actions/workflows/release.yml
+[`Create a release` workflow]: https://github.com/cilium/hubble/actions/workflows/release.yml