FIX-modin-project#2357: Fix path to documentation for contributing

Signed-off-by: Igoshev, Yaroslav <yaroslav.igoshev@intel.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,14 +1,14 @@
 <!--
-Thank you for your contribution! 
-Please review the contributing docs: https://modin.readthedocs.io/en/latest/contributing.html
+Thank you for your contribution!
+Please review the contributing docs: https://modin.readthedocs.io/en/latest/CONTRIBUTING.html
 if you have questions about contributing.
 -->
 
 ## What do these changes do?
 
 <!-- Please give a short brief about these changes. -->
 
-- [ ] commit message follows format outlined [here](https://modin.readthedocs.io/en/latest/developer/contributing.html)
+- [ ] commit message follows format outlined [here](https://modin.readthedocs.io/en/latest/CONTRIBUTING.html)
 - [ ] passes `flake8 modin`
 - [ ] passes `black --check modin`
 - [ ] signed commit with `git commit -s` <!-- you can amend your commit with a signature via `git commit -amend -s` -->