MOOSE Docs searching issue

[YaqiWang]

Bug Description

After we create a PR, Civet creates the docs for the PR and issues a link under the PR. When we click the link, it brings us to a site in the following pattern https://mooseframework.inl.gov/docs/PRs/#/site where # is the PR number. However, when we search on the site, the search results does not refer the PR number, which can give us Not Found error if the search word is particularly for this PR.

Steps to Reproduce

As mentioned in description.

Impact

Easier navigation to the docs for the new documentations added in a PR and possibly making the reviewing easier.

[YaqiWang]

Thanks!