Bump netty-codec from 4.1.24.Final to 4.1.68.Final

Bumps [netty-codec](https://github.com/netty/netty) from 4.1.24.Final to 4.1.68.Final.
- [Commits](https://github.com/netty/netty/compare/netty-4.1.24.Final...netty-4.1.68.Final)

---
updated-dependencies:
- dependency-name: io.netty:netty-codec
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 874fe0a..03722fb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -67,7 +67,7 @@
     <javax.activation.version>1.1.1</javax.activation.version>
     <maven-dependency-plugin.version>3.0.2</maven-dependency-plugin.version>
     <netty.boringssl.version>2.0.7.Final</netty.boringssl.version>
-    <netty.version>4.1.24.Final</netty.version>
+    <netty.version>4.1.68.Final</netty.version>
   </properties>
 
   <name>ServiceComb Saga</name>