Fix javadoc -Werror breakage on JDK 11 #2439

Job	Run time
Code format	52s
Javadoc	2m 56s
Unit test with docker service [JDK8]	14m 3s
Unit test with in-memory test service [Edge]	11m 6s
Unit test with cloud	4m 43s
Build native test server / Build native test server (ubuntu-24.04-arm, linux, arm64)	7m 2s
Build native test server / Build native test server (windows-latest, windows, amd64)	6m 3s
Build native test server / Build native test server (macos-15-intel, macOS, amd64)	7m 41s
Build native test server / Build native test server (ubuntu-latest, linux, amd64, false)	6m 50s
Build native test server / Build native test server (ubuntu-latest, linux, amd64, true)	6m 43s
Build native test server / Build native test server (macos-latest, macOS, arm64)	10m 41s
	1h 18m 40s

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