Fix internal formula json v3 frozen hash parsing bug #27256

Job	Run time
syntax	1m 7s
cask audit	3m 18s
formula audit	7m 34s
test default formula (Ubuntu 22.04)	4m 13s
docker	4m 12s
test default formula (Ubuntu 20.04)	5m 43s
tests (online)	8m 45s
tests (generic OS)	5m 31s
tap syntax	4m 58s
test default formula (macOS 13 x86_64)	2m 24s
update-test (Ubuntu 22.04)	1m 1s
test default formula (macOS 14 arm64)	1m 26s
update-test (macOS 13)	52s
tests (Ubuntu 22.04)	5m 52s
tests (Ubuntu 20.04)	6m 45s
vendored gems	59s
tests (macOS 13 x86_64)	8m 15s
tests (macOS 14 arm64)	10m 39s
	1h 23m 34s

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