Fixed link to documentation standards
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