fix: update protobuf-java and netty-handler to fix CVE-2024-7254 and CVE-2025-24970

[efussi]

The resulting versions are these:

$ tar -tvf ./build/distributions/otel-dc-llm-1.0.5.tar | grep -e protobuf-java -e netty-handler
-rw-rw-r-- 0/0           75564 2025-02-21 11:53 otel-dc-llm-1.0.5/lib/protobuf-java-util-4.28.2.jar
-rw-rw-r-- 0/0         1840061 2025-02-21 11:53 otel-dc-llm-1.0.5/lib/protobuf-java-4.28.2.jar
-rw-rw-r-- 0/0           25650 2025-02-21 14:59 otel-dc-llm-1.0.5/lib/netty-handler-proxy-4.1.118.Final.jar
-rw-rw-r-- 0/0          580162 2025-02-21 13:43 otel-dc-llm-1.0.5/lib/netty-handler-4.1.118.Final.jar

[chriwill]

lgtm