CHANGES(docs): Record the Ruff development floor

why: Contributors need the lint-tool requirement alongside other
development environment changes.

what:
- Document the Ruff 0.17.3 minimum for development and lint checks

Author: tony

CHANGES

@@ -66,6 +66,10 @@ it.
 
 ### Development
 
+#### Ruff 0.17.3 for development (#774)
+
+Minimum `ruff>=0.17.3` (was `>=0.17.1`) for development and CI lint checks.
+
 #### CI recovers from incompatible tmux caches (#835)
 
 CI rebuilds incompatible cached tmux installations before running tests.