Upgrade JSON Toolkit to `2b5158f2` #315

Job	Run time
docker	1m 27s
test (ubuntu-latest, clang, clang++, sh)	1m 22s
test (ubuntu-latest, gcc, g++, sh)	1m 11s
test (macos-13, clang, clang++, sh)	1m 35s
test (macos-14, clang, clang++, sh)	53s
test (windows-latest, pwsh)	4m 27s
	10m 55s

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