Bump io.netty:netty-pkitesting from 4.2.7.Final to 4.2.8.Final

Bumps [io.netty:netty-pkitesting](https://github.com/netty/netty) from 4.2.7.Final to 4.2.8.Final.
- [Commits](netty/netty@netty-4.2.7.Final...netty-4.2.8.Final)

---
updated-dependencies:
- dependency-name: io.netty:netty-pkitesting
  dependency-version: 4.2.8.Final
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -99,7 +99,7 @@
         <moby-names-generator.version>20.10.1-r0</moby-names-generator.version>
         <jacoco-maven-plugin.version>0.8.14</jacoco-maven-plugin.version>
         <bouncycastle.version>1.83</bouncycastle.version>
-        <netty.version>4.2.7.Final</netty.version>
+        <netty.version>4.2.8.Final</netty.version>
 
         <!-- Avoids issues with ryuk when running with podman https://github.com/containers/podman/issues/7927#issuecomment-731525556 -->
         <testcontainers.ryuk.disabled>true</testcontainers.ryuk.disabled>