Updating documentation to reflect the new flag

README.md

@@ -699,6 +699,7 @@ Flags:
       --team-reviewers strings     Github team names of the reviewers, in format: 'org/team'
   -T, --token string               The personal access token for the targeting platform. Can also be set using the GITHUB_TOKEN/GITLAB_TOKEN/GITEA_TOKEN/BITBUCKET_SERVER_TOKEN environment variable.
       --topic strings              The topic of a GitHub/GitLab/Gitea repository. All repositories having at least one matching topic are targeted.
+      --use-gh-api                 Attempt to commit and push through the Github API, rather than pushing through the git client.
   -U, --user strings               The name of a user. All repositories owned by that user will be used.
   -u, --username string            The Bitbucket server username.
 ```