Update RN date

Author: Steven Smith

modules/rn_3_15_0.adoc

@@ -7,7 +7,7 @@ The following sections detail _y_ and _z_ stream release information.
 [id="rn-3-15-2"]
 == RHBA-2025:15211 - {productname} 3.15.2 release
 
-Issued 2025-09-10
+Issued 2025-09-18
 
 {productname} release 3.15.2 is now available with Clair {clairproductminv}. The bug fixes that are included in the update are listed in the link:https://access.redhat.com/errata/RHBA-2025:15211[RHBA-2025:15211] advisory.