git-manage: Use OpenTofu instead of Terraform.

Actually use the `tf` wrapper.

Documents/bin/git-manage

@@ -11,7 +11,7 @@ import github3.exceptions  # pylint: disable=import-error
 import gitlab.exceptions  # pylint: disable=import-error
 import passhole.passhole  # pylint: disable=import-error
 import sh  # pylint: disable=import-error
-from sh import terraform  # pylint: disable=import-error
+from sh import tf as terraform  # pylint: disable=import-error
 
 sys.path.append(os.path.expanduser("~/Documents/bin"))