Upgrade to Netty 4.1.48.Final

Closes gh-20638

Author: snicoll

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

@@ -160,7 +160,7 @@
 		<mysql.version>8.0.19</mysql.version>
 		<nekohtml.version>1.9.22</nekohtml.version>
 		<neo4j-ogm.version>3.2.9</neo4j-ogm.version>
-		<netty.version>4.1.45.Final</netty.version>
+		<netty.version>4.1.48.Final</netty.version>
 		<netty-tcnative.version>2.0.29.Final</netty-tcnative.version>
 		<nio-multipart-parser.version>1.1.0</nio-multipart-parser.version>
 		<ojdbc.version>19.3.0.0</ojdbc.version>