Fixes bugs

[aaronw4]

Description

1. While on the profile page, a user has the option to update their display name. The 'update profile' button was not updating the profile.
2. Categories were not being assigned to tasks under certain circumstances.
3. Completed tasks were not being marked as completed.

Fixes # (issue)

1. The end point href in the actions file was incorrect. This PR puts the correct endpoint in the function updateUser.
2. Some functions that create a task were missing the category ID. This has been fixed.
3. The completed task function was refreshing the page before the axios call had been completed. This was fixed by turning it into an async function.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Change Status

• Complete, tested, ready to review and merge

How Has This Been Tested?

Ran locally on my computer.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My code has been reviewed by at least one peer
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• There are no merge conflicts