(main): Bump io.netty:netty-codec-http (#679)

Bumps [io.netty:netty-codec-http](https://github.com/netty/netty) from 4.1.90.Final to 4.1.104.Final.
- [Commits](netty/netty@netty-4.1.90.Final...netty-4.1.104.Final)

---
updated-dependencies:
- dependency-name: io.netty:netty-codec-http
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

asciidoctor-maven-plugin/pom.xml

@@ -19,7 +19,7 @@
 
     <properties>
         <maven.plugin.plugin.version>3.8.1</maven.plugin.plugin.version>
-        <netty.version>4.1.90.Final</netty.version>
+        <netty.version>4.1.104.Final</netty.version>
         <maven.coveralls.plugin.version>4.3.0</maven.coveralls.plugin.version>
     </properties>