Update HOLYIOT_json.h #2064

Job	Run time
GCC (9)	2m 7s
examples	1m 21s
python	23s
Clang (16, -fsanitize=leak -fno-sanitize-recover=all)	32s
Visual Studio (windows-2022)	53s
check	17s
XCode (16.1)	26s
	5m 59s

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