Recommend '-h' on error

The help is great, but not everyone might know to look there.

cvelib/cli.py

@@ -176,6 +176,7 @@ def wrapped(*args: Any, **kwargs: Any) -> Callable:
             click.echo("CVE record is not valid against the v5 JSON schema:")
             for error in exc.errors:
                 click.echo(f"  {error}")
+        click.echo("\nUse `cve <command> -h` for more information on how to use this command")
         sys.exit(1)
 
     return wrapped