Fixed #286 to log role name instead of role ID

[BPennie03]

Description

I changed the calls for role_mention in the bottom 2 conditional checks for the role to instead be role.name for better logs readability. I did not have to change the first one (shown in the below code) as the role variable is not yet defined, so it would cause errors.

try:
    int(role_mention[3:-1])
except ValueError:
    await interaction.channel.send("The `role_mention` parameter can only take role mentions (i.e. of format `@role`).")
    await log(self.bot, f"{interaction.user} tried clearing the '{role_mention}' role in #{interaction.channel} but failed because of an invalid role mention")
    return

Issues

Closes #286

Type of change

Select one or more of the following:

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Other (describe below)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. List any edge cases you tested. If you come up with any edge cases you didn't test while writing this PR, cancel the PR and test again.

• [ ] Run the CSE Bot in the CSE Testing Server
• [ ] Attempt to remove @admin role using /clearrole command
• [ ] See the error was logged and the role_name was printed instead of the role_id

Checklist:

• [x] All local commits have been pushed to remote
• [x] All changes on the base branch have been merged into this branch, either by rebase or merge
• [x] My code is PEP-8 compliant (excluding maximum line length, keep that to 100ish characters)
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have added Google Docstrings for all new functions/methods
• [x] I have made corresponding changes to the documentation