Fix comment about color depth. (#609)

* Fix comment about color depth

* Update {{cookiecutter.project_name}}/.github/workflows/ci.yml

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Co-authored-by: Henry Schreiner <[email protected]>

Author: mkcor

{{cookiecutter.project_name}}/.github/workflows/ci.yml

@@ -12,8 +12,9 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  # Many color libraries just need this to be set to any value, but at least
-  # one distinguishes color depth, where "3" -> "256-bit color".
+  # Many color libraries just need this variable to be set to any value.
+  # Set it to 3 to support 8-bit color graphics (256 colors per channel)
+  # for libraries that care about the value set.
   FORCE_COLOR: 3
 
 jobs: