Wrong help info for option --error-on-invalid-index

[JohnHien]

I run pg_repack --help and I get this:

  -C, --exclude-extension       don't repack tables which belong to specific extension
      --error-on-invalid-index  don't repack tables which belong to specific extension

Maybe the --error-on-invalid-index line was copied from --exclude-extension line but the author forgot to edit it after coping.

	printf("  -C, --exclude-extension       don't repack tables which belong to specific extension\n");
	printf("      --error-on-invalid-index  don't repack tables which belong to specific extension\n");

[za-arthur]

Indeed. Thank you for the report. I've created a PR: #424.

[za-arthur]

The PR was merged.