KNOX-2452 - Upgrade netty to 4.1.52.Final

Signed-off-by: Kevin Risden <krisden@apache.org>
diff --git a/pom.xml b/pom.xml
index 2945369..b66a5ba 100644
--- a/pom.xml
+++ b/pom.xml
@@ -239,7 +239,7 @@
         <maven-pmd-plugin.version>3.12.0</maven-pmd-plugin.version>
         <metrics.version>4.1.12.1</metrics.version>
         <mina.version>2.0.21</mina.version>
-        <netty.version>4.1.51.Final</netty.version>
+        <netty.version>4.1.52.Final</netty.version>
         <nimbus-jose-jwt.version>8.14.1</nimbus-jose-jwt.version>
         <nodejs.version>v12.18.2</nodejs.version>
         <okhttp.version>2.7.5</okhttp.version>