Minor release 3.11.15

https://lists.apache.org/list.html?dev@cassandra.apache.org
diff --git a/site-content/source/modules/ROOT/pages/download.adoc b/site-content/source/modules/ROOT/pages/download.adoc
index 54c99e3..b22142d 100644
--- a/site-content/source/modules/ROOT/pages/download.adoc
+++ b/site-content/source/modules/ROOT/pages/download.adoc
@@ -66,9 +66,9 @@
 ==== Maintained until 5.0.0 release (Nov-Dec 2023)
 
 [.btn.btn--alt]
-https://www.apache.org/dyn/closer.lua/cassandra/3.11.14/apache-cassandra-3.11.14-bin.tar.gz[3.11.14,window=blank]
+https://www.apache.org/dyn/closer.lua/cassandra/3.11.15/apache-cassandra-3.11.15-bin.tar.gz[3.11.15,window=blank]
 
-(https://downloads.apache.org/cassandra/3.11.14/apache-cassandra-3.11.14-bin.tar.gz.asc[pgp,window=blank], https://downloads.apache.org/cassandra/3.11.14/apache-cassandra-3.11.14-bin.tar.gz.sha256[sha256,window=blank] and https://downloads.apache.org/cassandra/3.11.14/apache-cassandra-3.11.14-bin.tar.gz.sha512[sha512,window=blank])
+(https://downloads.apache.org/cassandra/3.11.15/apache-cassandra-3.11.15-bin.tar.gz.asc[pgp,window=blank], https://downloads.apache.org/cassandra/3.11.15/apache-cassandra-3.11.15-bin.tar.gz.sha256[sha256,window=blank] and https://downloads.apache.org/cassandra/3.11.15/apache-cassandra-3.11.15-bin.tar.gz.sha512[sha512,window=blank])
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