Add `uri/json` to `docs_main` #12505

Job	Run time
check_format	1m 37s
deploy_api_docs	0s
x86_64-gnu-test-preview_mt	5m 49s
x86_64-gnu-test (1.7.3)	34m 40s
x86_64-musl-test	37m 59s
x86_64-gnu-test (1.8.2)	35m 17s
x86_64-gnu-test (1.9.2)	36m 41s
x86_64-gnu-test (1.10.1)	35m 9s
x86_64-gnu-test (1.11.2)	34m 33s
x86_64-gnu-test (1.12.2)	36m 5s
x86_64-gnu-test (1.13.3)	34m 50s
x86_64-gnu-test (1.0.0, FLAGS=-Dwithout_ffi USE_PCRE1=true)	32m 53s
x86_64-gnu-test (1.1.1, FLAGS=-Dwithout_ffi USE_PCRE1=true)	35m 36s
x86_64-gnu-test (1.2.2, USE_PCRE1=true)	36m 16s
x86_64-gnu-test (1.3.2, USE_PCRE1=true)	34m 19s
x86_64-gnu-test (1.4.1, USE_PCRE1=true)	36m 2s
x86_64-gnu-test (1.5.1, USE_PCRE1=true)	34m 37s
x86_64-gnu-test (1.6.2, USE_PCRE1=true)	34m 39s
	8h 57m 2s

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