Fix Providers doc refer to non-existent 'events.md'

[kingdonb]

Another commit to go with:

• Fix links in API docs source-controller#1200

[kingdonb]

There is no events.md - this is the result of anchor/404 testing being done on fluxcd/website#1573 and associated PRs

Please review and merge at will

[somtochiama]

@kingdonb Taking a closer look at this,
There is an events.md. The changes in this pull request result in a 404 when someone is navigating the spec docs readme from the GitHub UI.

The problem stems from the script in fluxcd/website importing events.md as event.md so it should be fixed there.
https://github.com/fluxcd/website/blob/1c2fa808008cd7ee0d0adfe9d2483d7db5320293/hack/import-flux2-assets.sh#L155

[stefanprodan]

Pinging @makkes

[makkes]

Sorry for the confusion. We had to change the docs structure in #582 so that all API type pages are pluralized. The import-flux2-assets.sh script in the main branch of the website repo will fail with the new structure until fluxcd/website#1577 is merged from which point it will pass again. Since we're not building the docs from the n-c main branch but only from a released version the docs structure change onf #582 has no impact on the current docs site.

I think we can close this PR and wait until fluxcd/website#1577 has been merged. Then, the anchor check should not fail, anymore.

[kingdonb]

OK, 👍 closing