Bump io.projectreactor.netty:reactor-netty from 1.2.7 to 1.2.8

---
updated-dependencies:
- dependency-name: io.projectreactor.netty:reactor-netty
  dependency-version: 1.2.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

sslcontext-kickstart-for-netty/pom.xml

@@ -37,7 +37,7 @@
 
     <properties>
         <version.netty-handler>4.2.2.Final</version.netty-handler>
-        <version.reactor-netty>1.2.7</version.reactor-netty>
+        <version.reactor-netty>1.2.8</version.reactor-netty>
     </properties>
 
     <dependencies>