Add og:description attribute to individual "Release" page
What does this MR do?
Adds og:description meta tags to the individual Release page.
This allows social media sites (Facebook, Twitter, etc.) and other communications platforms (Slack, Mattermost) to display a snippet of the release's description instead of the generic project description when a link to the release is shared.
This resolves #215389 (closed).
Screenshots
The screenshots below compare releases from the current GitLab project (https://gitlab.com/gitlab-org/gitlab/-/releases/v9.1.0-ee) to releases in this MR's review app. Because of this, the URL is different - this can be ignored.
| Platform | Before | After |
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| Slack |  |
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Edited by Nathan Friend