Adds note that nginx has been upgraded (quay#1475)

Co-authored-by: Steven Smith <[email protected]>

Author: stevsmit

modules/notable-technical-changes-316.adoc

@@ -4,5 +4,7 @@
 
 The following section highlights notable technical changes for {productname} 3.16.
 
-[id="example"]
-== Example
+[id="nginx-upgrade"]
+== Nginx upgrade
+
+Nginx version 1.22 went end-of-life (EOL) in November, 2025. With this update, Nginx references have been upgraded to version 1.24.