Updated argocd git tag

Package Merge Request

Package Changes

https://repo1.dso.mil/platform-one/big-bang/apps/core/argocd/-/blob/5.5.7-bb.6/CHANGELOG.md

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/core/argocd/-/merge_requests/110

For Issue

Closes https://repo1.dso.mil/platform-one/big-bang/apps/core/argocd/-/issues/64