Fix data key for FE chart links object
Created by: vovakulikov
Follow up for https://github.com/sourcegraph/sourcegraph/pull/29587
Apparently, we use timestamps as keys for x-axis. We should the sample date format as a key for the link URL map.
Created by: vovakulikov
Follow up for https://github.com/sourcegraph/sourcegraph/pull/29587
Apparently, we use timestamps as keys for x-axis. We should the sample date format as a key for the link URL map.