Add ignoreRevsFile to CONTRIBUTING.md

closes official-stockfish#4980

No functional change

CONTRIBUTING.md

@@ -61,6 +61,16 @@ Changes to Stockfish C++ code should respect our coding style defined by
 [.clang-format](.clang-format). You can format your changes by running
 `make format`. This requires clang-format version 17 to be installed on your system.
 
+## Navigate
+
+For experienced Git users who frequently use git blame, it is recommended to
+configure the blame.ignoreRevsFile setting.
+This setting is useful for excluding noisy formatting commits.
+
+```bash
+git config blame.ignoreRevsFile .git-blame-ignore-revs
+```
+
 ## Community and Communication
 
 - Join the [Stockfish discord][discord-link] to discuss ideas, issues, and