[Chore] Fix links in CONTRIBUTING.md

CONTRIBUTING.md

@@ -2,7 +2,7 @@
 
 ## Reporting Issues
 
-Please [open an issue][issues] if you find a bug or have a feature request.
+Please [open an issue](https://github.com/maypok86/otter/issues) if you find a bug or have a feature request.
 Note: you need to login (e. g. using your GitHub account) first.
 Before submitting a bug report or feature request, check to make sure it hasn't
 already been submitted
@@ -17,7 +17,7 @@ code in which this bug reproduces.
 If you would like to contribute code to fix a bug, add a new feature, or
 otherwise improve our product, pull requests are most welcome.
 
-Our pull request template contains a [checklist][pr-template] of acceptance
+Our pull request template contains a [checklist](https://github.com/maypok86/otter/blob/main/.github/pull_request_template.md) of acceptance
 criteria for your pull request.
 Please read it before you start contributing and make sure your contributions
 adhere to this checklist.