Add comment linking configmap names in deployments to names in role

If a user wants to change the names of the configmaps that Tekton's
controller and webhook use then they'll also need to update the
Roles associated with those deployments. The Roles explicitly name
the ConfigMaps that these deployments can access.

This PR just adds a comment to help remind people that if they're
changing the ConfigMap names they'll need to also update the Roles.

config/controller.yaml

@@ -67,6 +67,9 @@ spec:
           valueFrom:
             fieldRef:
               fieldPath: metadata.namespace
+        # If you are changing these names, you will also need to update
+        # the controller's Role in 200-role.yaml to include the new
+        # values in the "configmaps" "get" rule.
         - name: CONFIG_LOGGING_NAME
           value: config-logging
         - name: CONFIG_OBSERVABILITY_NAME

config/webhook.yaml

@@ -54,6 +54,9 @@ spec:
           valueFrom:
             fieldRef:
               fieldPath: metadata.namespace
+        # If you are changing these names, you will also need to update
+        # the webhook's Role in 200-role.yaml to include the new
+        # values in the "configmaps" "get" rule.
         - name: CONFIG_LOGGING_NAME
           value: config-logging
         - name: CONFIG_OBSERVABILITY_NAME