Confusing placeholder text for issue URLs

[mbeacom]

User Story

As a user, I want to see a proper example of an issue URL when a Github issue url is expected.

Why Is this Needed?

Summary: A user reported experiencing confusion when directed by the Fund Issue form to provide an issue url like: https://github.com/user/repo/pull/n

Description

Type: Enhancement

Current Behavior

User is currently displayed: https://github.com/user/repo/pull/n versus https://github.com/user/repo/issues/n as an example issue URL when filling out bounty related forms.

Expected Behavior

User is displayed: https://github.com/user/repo/issues/n to align with Github issue urls.
When a PR or issue url is expected, display the option for both https://github.com/user/repo/pull|issues/n - Example: User is filling out the Send Tip form.