Fix broken markup on 2.12 release notes

Change-Id: I698a26ea7f07febd15689884c2f5a36ca84a2f27
diff --git a/releases/2.12.md b/releases/2.12.md
index ee8e8e5..c12c111 100644
--- a/releases/2.12.md
+++ b/releases/2.12.md
@@ -10,7 +10,7 @@
 | [2.12](https://gerrit-releases.storage.googleapis.com/gerrit-2.12.war)
 
 Documentation: **[2.12.7](https://gerrit-documentation.storage.googleapis.com/Documentation/2.12.7/index.html)**
-| [2.12.6](https://gerrit-documentation.storage.googleapis.com/Documentation/2.12.6/index.html)**
+| [2.12.6](https://gerrit-documentation.storage.googleapis.com/Documentation/2.12.6/index.html)
 | [2.12.5](https://gerrit-documentation.storage.googleapis.com/Documentation/2.12.5/index.html)
 | [2.12.4](https://gerrit-documentation.storage.googleapis.com/Documentation/2.12.4/index.html)
 | [2.12.3](https://gerrit-documentation.storage.googleapis.com/Documentation/2.12.3/index.html)