Updated loki git tag

Package Merge Request

Package Changes

https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/loki/-/blob/1.7.6-bb.2/CHANGELOG.md

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/loki/-/merge_requests/46

For Issue

Closes https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/loki/-/issues/20