fix broken link in CONTRIBUTING.md (bitwalker#556)

The link under [interactive rebase] was giving a 404, I searched in help.github.com/articles and this link is the most suitable https://help.github.com/en/articles/using-git-rebase-on-the-command-line
gaiabeatrice · Sep 25, 2019 · 78bee8d · 78bee8d
1 parent 08b590d
commit 78bee8d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -204,7 +204,7 @@ in order to craft an excellent pull request:
 4. Commit your changes in logical chunks. Keep your commit messages organized,
    with a short description in the first line and more detailed information on
    the following lines. Feel free to use Git's
-   [interactive rebase](https://help.github.com/articles/interactive-rebase)
+   [interactive rebase](https://help.github.com/en/articles/using-git-rebase-on-the-command-line)
    feature to tidy up your commits before making them public.
 
 5. Make sure all the tests are still passing.