[FEATURE] Accept HTTP code 202 in link checker

[lukas-vlcek]

Accept also HTTP code 202 in link checker:
https://github.com/opensearch-project/opensearch-prometheus-exporter/blob/main/.github/workflows/link-checker.yml#L19

There has been case where soundcloud.com returned code 202 like this:

### Errors in licenses/simpleclient-NOTICE.txt

* [202] <http://soundcloud.com/> | Rejected status code (this depends on your "accept" configuration): Accepted

### Errors in licenses/simpleclient_common-NOTICE.txt

* [202] <http://soundcloud.com/> | Rejected status code (this depends on your "accept" configuration): Accepted

[lukas-vlcek]

Update: when I rerun the failed job in #445 then all link checks were green. Hence adding wontfix label for now. But let's keep this ticket open for some time.

In the future we shall exclude whole licenses folder from link checker IMO.