docs: Mention Apache Hadoop OpenSSL fixes

Author: Techassi

modules/ROOT/partials/release-notes/release-25.7.adoc

@@ -171,6 +171,9 @@ This includes 3 critical and 97 high-severity CVEs.
   See https://github.com/stackabletech/hdfs-operator/issues/685[hdfs-operator#685].
 * The operator now defaults `dfs.encrypt.data.transfer.cipher.suite` to `AES/CTR/NoPadding` to improve security and performance.
   See https://github.com/stackabletech/hdfs-operator/pull/693[hdfs-operator#693].
+* Previously Apache Hadoop wouldn't find and use the native OpenSSL library to speed up crypto operations.
+  This was fixed by adding a https://issues.apache.org/jira/browse/HADOOP-12845[missing symlink] and backporting https://issues.apache.org/jira/browse/HADOOP-18583[HADOOP-18583].
+  See https://github.com/stackabletech/docker-images/pull/1209[docker-images#1209].
 
 ===== Apache NiFi