UNCLASSIFIED - NO CUI

Fix missing comma for issuer_uri

Micah Nagelrequested to merge
gitlab-issuer-uri-comma into master

General MR

Summary

Missing comma when using custom issuer_uri

Closes https://repo1.dso.mil/platform-one/big-bang/bigbang/-/issues/1135

Merge request reports

UNCLASSIFIED - NO CUI