docs(prompts): simplify rule citation guidance

.pi/prompts/review.md

@@ -35,7 +35,7 @@ Fix: suggested fix
 Keep the code excerpt to one to three lines when possible.
 Use a longer excerpt only when the violation needs surrounding context.
 Use `...` to omit unrelated lines from a multi-line excerpt.
-Use a style-skill rule citation, such as `rust::files.md:23`, `build::dependencies.md:7`, or `nix::let.md:7`.
+Use a style-skill rule citation in the form `skill::rule-file:line`.
 Make the fix direct.
 Do not include alternatives when one fix best follows the cited rule.