chore: tick off docs task per default in pr template

Author: rubenhoenle

.github/pull_request_template.md

@@ -12,7 +12,7 @@ relates to #1234
 - [ ] Issue was linked above
 - [ ] Code format was applied: `make fmt`
 - [ ] Examples were added / adjusted (see e.g. [here](https://github.com/stackitcloud/stackit-cli/blob/ef291d1683ca5b0d719ec0a26ecb999a32685117/internal/cmd/ske/cluster/create/create.go#L49-L63))
-- [ ] Docs are up-to-date: `make generate-docs` (will be checked by CI)
+- [x] Docs are up-to-date: `make generate-docs` (will be checked by CI)
 - [ ] Unit tests got implemented or updated
 - [x] Unit tests are passing: `make test` (will be checked by CI)
 - [x] No linter issues: `make lint` (will be checked by CI)