[PR #9953/27e23fb0 backport][3.11] Add .codspeed folder to .gitignore (#9956)

**This is a backport of PR #9953 as merged into master
(27e23fb).**

The folder contains https://codspeed.io local run results

Co-authored-by: Andrew Svetlov <[email protected]>

Author: patchback[bot]

.gitignore

@@ -13,6 +13,7 @@
 .DS_Store
 .Python
 .cache
+.codspeed
 .coverage
 .coverage.*
 .develop