<!--
Feature Requests:
  Please read https://github.com/jquery/jquery/wiki/Adding-new-features
  Most features should start as plugins outside of jQuery.

Bug Reports:
  Note that we only can fix bugs in the latest version of jQuery.
  Briefly describe the issue you've encountered
  *  What do you expect to happen?
  *  What actually happens?
  *  Which browsers are affected?
  Provide a *minimal* test case, see https://webkit.org/test-case-reduction/
  Use the latest shipping version of jQuery in your test case!
  We prefer test cases on JS Bin (https://jsbin.com/qawicop/edit?html,css,js,output) or CodePen (https://codepen.io/mgol/pen/wNWJbZ)

Frequently Reported Issues:
  * Selectors with '#' break: See https://github.com/jquery/jquery/issues/2824
-->

### Description ###


### Link to test case ###


<!--
Feature Requests:
  Please read https://github.com/jquery/jquery/wiki/Adding-new-features
  Most features should start as plugins outside of jQuery.

Bug Reports:
  Note that we only can fix bugs in the latest version of jQuery.
  Briefly describe the issue you've encountered
  *  What do you expect to happen?
  *  What actually happens?
  *  Which browsers are affected?
  Provide a *minimal* test case, see https://webkit.org/test-case-reduction/
  Use the latest shipping version of jQuery in your test case!
  We prefer test cases on JS Bin (https://jsbin.com/qawicop/edit?html,css,js,output) or CodePen (https://codepen.io/mgol/pen/wNWJbZ)

Frequently Reported Issues:
  * Self-closing tags broken in jQuery 3.5.0 or newer: please read the [jQuery 3.5.0 blog post](https://blog.jquery.com/2020/04/10/jquery-3-5-0-released/) & the [upgrade guide](https://jquery.com/upgrade-guide/3.5/); see also issue #4681.
-->

### Description ###


### Link to test case ###


Update Frequently Reported Issues in the GitHub issue template
Docs: Update Frequently Reported Issues in the GitHub issue template

The issue about selectors with '#' being broken is old and no longer
frequently reported so this commit removes it from the list. On the other
hand, we're now getting lots of reports about the security fix in jQuery 3.5.0
that was also a breaking change: gh-4642. This one is now mentioned in the
list.

Closes gh-4728
Ref gh-4642