minor #4358 Fixed link to documentation standards (sivolobov)

This PR was merged into the 2.3 branch.

Discussion
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Fixed link to documentation standards

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs? | no
| Applies to   | all versions
| Fixed tickets | no tickets

Commits
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49e5dad Fixed link to documentation standards

Author: wouterj

contributing/documentation/overview.rst

@@ -68,7 +68,7 @@ memorable name for the new branch:
 
 **Step 5.** Now make your changes in the documentation. Add, tweak, reword and
 even remove any content, but make sure that you comply with the
-doc:`/contributing/documentation/standards`.
+:doc:`/contributing/documentation/standards`.
 
 **Step 6.** **Push** the changes to your forked repository: