build(deps): bump io.netty:netty-codec in /extensions/open-mysql-db (#4073)

Bumps [io.netty:netty-codec](https://github.com/netty/netty) from 4.1.68.Final to 4.1.125.Final.
- [Commits](netty/netty@netty-4.1.68.Final...netty-4.1.125.Final)

---
updated-dependencies:
- dependency-name: io.netty:netty-codec
  dependency-version: 4.1.125.Final
  dependency-type: direct:production
...

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Author: dependabot[bot]

extensions/open-mysql-db/pom.xml

@@ -15,7 +15,7 @@
         <maven.compiler.target>1.7</maven.compiler.target>
 
         <java.version>11</java.version>
-        <netty.version>4.1.68.Final</netty.version>
+        <netty.version>4.1.125.Final</netty.version>
         <mysql.version>8.0.28</mysql.version>
     </properties>