Code Scanning: Add sunset date for issue <> alerts (#55229)

Author: marcogario

data/reusables/code-scanning/beta-alert-tracking-in-issues.md

@@ -1,8 +1,12 @@
+ <!-- expires 2025-04-30 -->
+
 {% ifversion code-scanning-task-lists %}
 
 > [!NOTE]
-> The tracking of {% data variables.product.prodname_code_scanning %} alerts in issues is in {% data variables.release-phases.public_preview %} and subject to change.
+> The tracking of {% data variables.product.prodname_code_scanning %} alerts in issues is {% data variables.release-phases.closing_down %} on April 30th, 2025.
 >
 > This feature supports running analysis natively using {% data variables.product.prodname_actions %} or externally using existing CI/CD infrastructure, as well as third-party {% data variables.product.prodname_code_scanning %} tools, but _not_ third-party tracking tools.
 
 {% endif %}
+
+  <!-- end expires 2025-04-30 -->