docs(gerrit): use list in known problem section (#26542)

lib/modules/platform/gerrit/readme.md

@@ -64,7 +64,7 @@ For example, if you want to use the [Merge Confidence](https://docs.renovatebot.
 Sometimes the PR title passed to the Gerrit platform code is different from the first line of the commit message.
 For example:
 
-Commit-Message=`Update keycloak.version to v21` \
-Pull-Request-Title=`Update keycloak.version to v21 (major)`
+- Commit-Message=`Update keycloak.version to v21`
+- Pull-Request-Title=`Update keycloak.version to v21 (major)`
 
 In this case the Gerrit-Platform implementation tries to detect this and change the commit-message in a second patch-set.