build(deps): Bump io.netty:netty-codec-http in /server

Bumps [io.netty:netty-codec-http](https://github.com/netty/netty) from 4.1.56.Final to 4.1.93.Final.
- [Commits](netty/netty@netty-4.1.56.Final...netty-4.1.93.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>

server/appengine/build.gradle

@@ -65,7 +65,7 @@ dependencies {
 
     implementation 'com.google.firebase:firebase-admin:7.1.0'
     // 4.1.34.Final included in Firebase, which has vulnerabilities.
-    implementation 'io.netty:netty-codec-http:4.1.56.Final'
+    implementation 'io.netty:netty-codec-http:4.1.93.Final'
 
     // Newer versions
     implementation 'com.google.oauth-client:google-oauth-client:1.31.2'

server/build.gradle

@@ -19,7 +19,7 @@ buildscript {
             'jdk14': "org.slf4j:slf4j-jdk14:${versions.slf4j}",
         ],
         'firebase': "com.google.firebase:firebase-admin:7.1.0",
-        'netty': 'io.netty:netty-codec-http:4.1.56.Final',
+        'netty': 'io.netty:netty-codec-http:4.1.93.Final',
         'guava': "com.google.guava:guava:30.1-jre",
         'gson': "com.google.code.gson:gson:2.8.6",
         'servlet': "javax.servlet:javax.servlet-api:3.1.0",