Presentations page: Merge duplicate entries for git-repo-metrics plugin talk

The link to the video had been added by change If1b06aa69, afterwards
change Id7ddfd198 added the links to the slides, but at a different
place.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I77bc2d4aa95add52add560fa1903b72ff75910eb
diff --git a/pages/site/community/presentations.md b/pages/site/community/presentations.md
index 1b4dd09..3f24415 100644
--- a/pages/site/community/presentations.md
+++ b/pages/site/community/presentations.md
@@ -140,7 +140,6 @@
 
 ## Analytics
 
-* [Git Repo Metrics Plugin](https://docs.google.com/presentation/d/15Ed--hWpnlJzj5a0Y7JDE0ZxSvCH62J6yus7K8z7ENk) (2022)
 * [Gerrit Analytics applied to the Android project](https://www.slideshare.net/lucamilanesio/gerrit-analytics-applied-to-android-source-code) (2019)
 * [Show me your dashboard](https://docs.google.com/presentation/d/1EeJdCngQaVBxJPQaGC2DYtTS9gzM9II-uoi7DtPQkw0/view) (2019)
 * [DevOps Analytics - Uncover the value of Gerrit Pipeline](https://www.slideshare.net/lucamilanesio/gerrit-devops-analytics-uncover-the-value-of-cicd-pipeline) (2018)
@@ -165,7 +164,7 @@
   * [Video](https://www.youtube.com/watch?v=Su1OpJ_s850&list=PLySCWiWz9cNv9oV7mOjWIkRuhC_wC9kKr)
 * [Master to main migration at Google](https://docs.google.com/presentation/d/14G4m7YDAY-S2O8bsktgKRCNIKS4zrRej4MiBye9LfaU/view) (2021)
 * Metrics:
-  * git-repo-metrics plugin (2022)
+  * [git-repo-metrics plugin](https://docs.google.com/presentation/d/15Ed--hWpnlJzj5a0Y7JDE0ZxSvCH62J6yus7K8z7ENk) (2022)
     * [Video](https://www.youtube.com/watch?v=4u2Fe0h8_IU&list=PLySCWiWz9cNv9oV7mOjWIkRuhC_wC9kKr)
 * NoteDb:
   * [How to import project changes between Gerrit Servers](https://storage.googleapis.com/gerrit-talks/summit/2022/Import%20Gerrit%20projects%20across%20servers.pdf) (2022)