fix: Remove trailing comma that made catalog-info.yaml invalid yaml

[pomegranited]

Description: Fix to the catalog-info.yaml file added by #287

cf openedx/edx-submissions#234

Testing instructions: N/A

Merge checklist:

• All reviewers approved
• CI build is green
• Version bumped - N/A
• Changelog record added - N/A
• Documentation updated (not only docstrings) - N/A
• Commits are squashed

Post merge:

• Create a tag - N/A
• Check new version is pushed to PyPi after tag-triggered build is finished. - N/A
• Delete working branch (if not needed anymore)

[sarina]

@e0d still stuck 😢

[pomegranited]

@e0d @sarina This isn't the only PR on this repo experiencing this issue:

• chore: remove cosmo team from requirements email #290
• Python Requirements Update #289

It works for #279, but that PR was updated before I merged #287 last week, which added catalog-info.yml.

I can't see how the cla checks work, but do they use Backstage at all? Is it possible that they're failing because of the typo this PR is trying to fix?

[sarina]

I pinged the team, so will hope to have an answer tomorrow. :\

[feanil]

The check is failing because the catalog-info.yaml file is mis-formatted, I've verified that Jill has a valid CLA right now so I'm gonna override the check and merge this.

[feanil]

@pomegranited CLA check sholud work correctly on other PRs now, you may need to add a comment or update the title to get it to run again.