Update release notes for 3.16 series (#55355)

Co-authored-by: Sophie <[email protected]>

Author: pnsk

data/release-notes/enterprise-server/3-16/0.yml

@@ -222,7 +222,9 @@ sections:
       {% data reusables.release-notes.2025-03-03-elasticsearch-data-loss %}
 
       [Updated: 2025-03-19]
-
+    - |
+      The security risk page returns a 500 error when Secret scanning is disabled. [Updated: 2025-04-25]
+   
   closing_down:
     # https://github.com/github/releases/issues/4683
     - |

data/release-notes/enterprise-server/3-16/1.yml

@@ -72,7 +72,8 @@ sections:
       After a restore, existing outside collaborators cannot be added to repositories in a new organization. This issue can be resolved by running `/usr/local/share/enterprise/ghe-es-search-repair` on the appliance after at least one hour system uptime. [Updated: 2025-04-22]
     - |
       After a geo-replica is promoted to be a primary by running `ghe-repl-promote`, the actions workflow of a repository does not have any suggested workflows.
-
+    - |
+      The security risk page returns a 500 error when Secret scanning is disabled. [Updated: 2025-04-25]
   errata:
     - |
       Known issues incorrectly indicated that administrators could immediately run the `/usr/local/share/enterprise/ghe-es-search-repair` script after a restore to resolve indexing and collaborator access issues. In reality, this script must be run only after the system has been up for at least one hour. [Updated: 2025-04-22]

data/release-notes/enterprise-server/3-16/2.yml

@@ -78,3 +78,6 @@ sections:
       After a geo-replica is promoted to be a primary by running `ghe-repl-promote`, the actions workflow of a repository does not have any suggested workflows.
     - |
       Repository Cache Replicas return `Repository not found` when changes have been pushed to the Primary instance that have not yet synchronized to the Cache Replica. This issue can also occur in all previous patches of this release.
+    - |
+      The security risk page returns a 500 error when Secret scanning is disabled. [Updated: 2025-04-25]
+