Upgrade to Netty 4.1.51.Final

Closes gh-22424

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -142,7 +142,7 @@
 		<mysql.version>8.0.20</mysql.version>
 		<nekohtml.version>1.9.22</nekohtml.version>
 		<neo4j-ogm.version>3.1.19</neo4j-ogm.version>
-		<netty.version>4.1.50.Final</netty.version>
+		<netty.version>4.1.51.Final</netty.version>
 		<netty-tcnative.version>2.0.31.Final</netty-tcnative.version>
 		<nio-multipart-parser.version>1.1.0</nio-multipart-parser.version>
 		<pooled-jms.version>1.0.6</pooled-jms.version>