Upgrade JSON Toolkit to `9685d29e2e633d71319c64b1ab2fbceab865dbf3` (#… #1015

Job	Run time
test (macos-latest, clang, clang++, static)	2m 15s
test (macos-latest, clang, clang++, shared)	1m 56s
test (ubuntu-latest, clang, clang++, static)	2m 28s
test (ubuntu-latest, gcc, g++, static)	2m 45s
test (ubuntu-latest, clang, clang++, shared)	2m 28s
test (ubuntu-latest, gcc, g++, shared)	2m 30s
test (windows-latest, static)	3m 37s
test (windows-latest, shared)	3m 24s
test (ubuntu-latest, clang, clang++, static, -DHYDRA_UNDEFINED_SANITIZER:BOOL=ON)	2m 33s
	23m 56s

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