Bump log4j2Version in /elixir-to-java/java-grpc-elixir-server (#1798) #6038

Job	Run time
latest_versions	7s
build-java17 (java-to-java, java-api-server, ./gradlew bootBuildImage, java-grpc-server, ./gradle...	2m 8s
configure	0s
build-java17 (java-to-rust, java-grpc-example, ./gradlew bootBuildImage, protoc --proto_path=./ru...	2m 0s
build-java17 (micronaut-to-springboot, java-micronaut-grpc-server, ./gradlew bootBuildImage, dock...	2m 8s
	6m 23s

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