Upgrade JSON Toolkit to `2b5158f2` #316

Job	Run time
docker	1m 29s
test (ubuntu-latest, clang, clang++, sh)	1m 32s
test (ubuntu-latest, gcc, g++, sh)	1m 10s
test (macos-13, clang, clang++, sh)	1m 56s
test (macos-14, clang, clang++, sh)	1m 3s
test (windows-latest, pwsh)	4m 9s
	11m 19s

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