chore: Update issue template

Author: Techassi

.github/ISSUE_TEMPLATE/pre-release.md

@@ -46,6 +46,7 @@ Part of <https://github.com/stackabletech/issues/TRACKING_ISSUE>
 ```[tasklist]
 ### Tasks in this Repository
 - [ ] Update Rust toolchain in the `config/versions.yaml` file.
+- [ ] Update Rust toolchain in UBI8, UBI9, and stackable-base images
 - [ ] Generate downstream PRs using the ["Generate Downstream PRs"](https://github.com/stackabletech/operator-templating/actions/workflows/generate_prs.yml) action.
 - [ ] [Search for PRs](https://github.com/search?q=org%3Astackabletech%20sort%3Aupdated-desc%20is%3Apr%20is%3Aopen%20Update%20templated%20files&type=pullrequests) and add them to the task list below.
 - [ ] Merge downstream PRs, see below for more details.