CompatHelper: add new compat entry for Colors at version 0.12, (keep existing compat)

[algebraicjuliabot]

This pull request sets the compat entry for the Colors package to 0.12. This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry. It is your responsibility to make sure that your package tests pass before you merge this pull request. Note: Consider registering a new release of your package immediately after merging this PR, as downstream packages may depend on this for tests to pass.

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (813a397) 96.13% compared to head (9403c88) 96.13%. Report is 1 commits behind head on main.

:exclamation: Current head 9403c88 differs from pull request most recent head 7df5d94. Consider uploading reports for the commit 7df5d94 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #90 +/- ## ======================================= Coverage 96.13% 96.13% ======================================= Files 22 22 Lines 1088 1088 ======================================= Hits 1046 1046 Misses 42 42 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.