Hi,

The project https://github.com/open-telemetry/opamp-go uses this action (Workflow config https://github.com/open-telemetry/opamp-go/blob/c1931d7bacc7424e274e5bbdb47ab16829c438de/.github/workflows/build-and-test.yml#L101-L109) for coverage reporting and tracking.

Coverage report on the most recent PR merged to main open-telemetry/opamp-go#207 shows 71.58% (-4.54%) compared to open-telemetry/opamp-go@efddaa2. However, the base commit used for comparison is from last year, Nov 18th. Similarly, for the PRs which are yet to be merged, I assumed they would be compared against the main, i.e. open-telemetry/opamp-go@c1931d7 but these runs also use efddaa which is incorrect. Here is an example PR that has a wrong base commit: open-telemetry/opamp-go#192.