Plan your Upgrade page incorrectly showing warning about unsupported GIT version

Issue Summary

Bitbucket supports GIT.

However, Bitbucket's Plan your Upgrade page shows a warning of unsupported GIT version:

Steps to Reproduce

1. Install Bitbucket 7.21.0.
2. Go to Administration -> Plan your upgrade, where you will see the warning.

Expected Results

No warning is shown.

Actual Results

There is a warning:

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available