BUG: fix doc for Webhook check

[laurentsimon]

If there is no support for token authentication, consider implementing it by following [these directions](https://docs.github.com/en/developers/webhooks-and-events/webhooks/securing-your-webhooks). is mis-leading because users do not control the authentication support: the webhook service is often provided by a 3P entity.

[Suhit-Majumdar]

Hi! Can you please suggest which file is the bug in? I will go through it and try to resolve it after going through the documentation in detail.

[laurentsimon]

Update https://github.com/ossf/scorecard/blob/main/docs/checks/internal/checks.yaml then run make generate-docs from the root directory to update https://github.com/ossf/scorecard/blob/main/docs/checks.md

[spencerschrock]

Can be fixed at same time as #2154

[leec94]

i can take on this issue. is the solution to this issue to update the doc to remove that sentence? i can look at #2154 as well

[spencerschrock]

i can take on this issue. is the solution to this issue to update the doc to remove that sentence? i can look at #2154 as well

I could see removing it, or clarifying what a repo owner can do. Maybe something like "check if the webhook can be configured to use auth " or "request the functionality"?