add missing lock #2343

Job	Run time
build-test-downstream (ubuntu-24.04, ubuntu-24.04-clang-18, ubuntu-24.04-clang-18)	14m 17s
build (ubuntu-24.04, ubuntu-24.04-clang-18, android-35-x86_64, 28.1.13356709)	16m 19s
build (macos-15, macos-15-armv8-clang-14, macos-15-armv8-clang-14)	11m 56s
build (windows-2022, windows-2022-msvc-1940, windows-2022-msvc-1940)	3m 44s
build (ubuntu-24.04, ubuntu-24.04-gcc-14, ubuntu-24.04-gcc-14)	11m 13s
build (ubuntu-24.04, ubuntu-24.04-clang-18, ubuntu-24.04-clang-18)	14m 25s
build (macos-26, macos-26-armv8-clang-14, macos-26-armv8-clang-14)	11m 12s
docker (ubuntu-24.04, ubuntu-24.04-clang-18)	33s
test (macos-26, macos-26-armv8-clang-14)	4m 39s
	1h 28m 18s

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