docs: add example to change golang version

Signed-off-by: joshjms <[email protected]>

Author: joshjms

Documentation/contributor-guide/bump_etcd_version_k8s.md

@@ -55,18 +55,22 @@ You can refer to the guide [here](https://github.com/kubernetes/community/blob/m
 
 > Reference: [link 1](https://github.com/kubernetes/kubernetes/pull/131105) [link 2](https://github.com/kubernetes/kubernetes/pull/131126)
 
-1. In `build/dependencies.yaml`, update the `version` of `etcd-image` and `golang: etcd release version` to the new version.
+1. In `build/dependencies.yaml`, update the `version` of `etcd-image` to the new version. Update `golang: etcd release version` if necessary.
 
     ```yaml
     - name: "etcd-image"
-    # version: 3.5.17
-    version: 3.5.21
-    refPaths:
-    - path: cluster/images/etcd/Makefile
-    match: BUNDLED_ETCD_VERSIONS\?|
+      # version: 3.5.17
+      version: 3.5.21
+      refPaths:
+      - path: cluster/images/etcd/Makefile
+        match: BUNDLED_ETCD_VERSIONS\?|
+    ---
+    - name: "golang: etcd release version"
+      # version: 1.22.9
+      version: 1.23.7 # https://github.com/etcd-io/etcd/blob/main/CHANGELOG/CHANGELOG-3.6.md
     ```
 
-2. In `cluster/images/etcd/Makefile`, include the new version in `BUNDLED_ETCD_VERSIONS` and update the `LATEST_ETCD_VERSION` as well (the image tag will be generated from the `LATEST_ETCD_VERSION`). Update `GOLANG_VERSION` if necessary.
+2. In `cluster/images/etcd/Makefile`, include the new version in `BUNDLED_ETCD_VERSIONS` and update the `LATEST_ETCD_VERSION` as well (the image tag will be generated from the `LATEST_ETCD_VERSION`). Update `GOLANG_VERSION` according to the version used to compile that release version (`"golang: etcd release version"` in step 1).
 
     ```Makefile
     # BUNDLED_ETCD_VERSIONS?=3.4.18 3.5.17