Minor init-wording update

Author: derek-globus

src/globus_registered_api/commands/init.py

@@ -104,7 +104,7 @@ def init_command(ctx: CLIContext) -> None:
     click.echo()
     click.echo("Successfully initialized repository!")
     click.echo()
-    click.echo("To start registering targets, use 'gra manage'.")
+    click.echo("To start configuring Registered APIs, use 'gra manage'.")
 
 
 def _prompt_for_inline_core_config() -> CoreConfig: