Update CODEOWNERS - remove commas

General MR

Summary

The commas trip up the automation we have for parsing the CODEOWNERS files and are unneceessary.

Relevant logs/screenshots

The commas cause obvious (valid) names like ryan.j.garcia to parse as ryan.j.garcia, and not match users in the members.json file bigbang bot uses.

Auditing Base Application CI's CODEOWNERS
	- micah.nagel - user is in the team charter for this repo but their employment dates are not longer active
	- ryan.j.garcia, - user is in the team charter for this repo but is unrecognized
	- dylan.anderson, - user is in the team charter for this repo but is unrecognized
	- ninonocita, - user is in the team charter for this repo but is unrecognized
	- bwijayaw - user is in the team charter for this repo but is unrecognized

Linked Issue

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Upgrade Notices

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