Regenerate gkebackup client (#6921)

Generated in GitHub action: https://togithub.com/googleapis/googleapis/google-api-php-client-services/actions/workflows/codegen.yaml

Author: yoshi-code-bot

src/BackupforGKE/Resource/ProjectsLocations.php

@@ -52,9 +52,9 @@ public function get($name, $optParams = [])
    * applicable.
    * @param array $optParams Optional parameters.
    *
-   * @opt_param string extraLocationTypes Optional. Do not use this field. It is
-   * unsupported and is ignored unless explicitly documented otherwise. This is
-   * primarily for internal usage.
+   * @opt_param string extraLocationTypes Optional. Unless explicitly documented
+   * otherwise, don't use this unsupported field which is primarily intended for
+   * internal usage.
    * @opt_param string filter A filter to narrow down results to a preferred
    * subset. The filtering language accepts strings like `"displayName=tokyo"`,
    * and is documented in more detail in [AIP-160](https://google.aip.dev/160).