Merge pull request #11878 from cahillsf/update-ci-release-doc

📖 Update CI release docs

Author: k8s-ci-robot

docs/release/role-handbooks/ci-signal/README.md

@@ -38,13 +38,14 @@ While we add test coverage for the new release branch we will also drop the test
             * Change intervals (let's use the same as for `release-1.7`).
 2. Create a new dashboard for the new branch in: `test-infra/config/testgrids/kubernetes/sig-cluster-lifecycle/config.yaml` (`dashboard_groups` and `dashboards`).
 3. Remove old release branches and unused versions from the `cluster-api-prowjob-gen.yaml` file in [test-infra](https://github.com/kubernetes/test-infra/blob/master/config/jobs/kubernetes-sigs/cluster-api/) according to our policy documented in [Support and guarantees](../../../../CONTRIBUTING.md#support-and-guarantees). As we just added `release-1.8`, then we can now drop test coverage for the `release-1.5` branch.
-4. Regenerate the prowjob configuration running `make generate-test-infra-prowjobs` command from cluster-api repository. Before running this command, ensure to export the `TEST_INFRA_DIR` variable, specifying the location of the [test-infra](https://github.com/kubernetes/test-infra/) repository in your environment. For further information, refer to this [link](https://github.com/kubernetes-sigs/cluster-api/pull/9937).
+4. Review the templates and modify/remove any outdated logic in the templates.  For example, when `release-1.7` is dropped from support, it can be removed from [this if statement](https://github.com/kubernetes/test-infra/blob/fa895d9f204e912e2bf0bd42221017a6dedf6065/config/jobs/kubernetes-sigs/cluster-api/templates/cluster-api-periodics-upgrades.yaml.tpl#L42).
+5. Regenerate the prowjob configuration running `make generate-test-infra-prowjobs` command from cluster-api repository. Before running this command, ensure to export the `TEST_INFRA_DIR` variable, specifying the location of the [test-infra](https://github.com/kubernetes/test-infra/) repository in your environment. For further information, refer to this [link](https://github.com/kubernetes-sigs/cluster-api/pull/9937).
 
  ```sh
   TEST_INFRA_DIR=../../k8s.io/test-infra make generate-test-infra-prowjobs
   ```
-5. Verify the jobs and dashboards a day later by taking a look at: `https://testgrid.k8s.io/sig-cluster-lifecycle-cluster-api-1.8`
-6. Update the [PR markdown link checker](https://github.com/kubernetes-sigs/cluster-api/blob/main/.github/workflows/pr-md-link-check.yaml) accordingly (e.g. `main` -> `release-1.8`).
+6. Verify the jobs and dashboards a day later by taking a look at: `https://testgrid.k8s.io/sig-cluster-lifecycle-cluster-api-1.8`
+7. Update the [PR markdown link checker](https://github.com/kubernetes-sigs/cluster-api/blob/main/.github/workflows/pr-md-link-check.yaml) accordingly (e.g. `main` -> `release-1.8`).
 
 Prior art: