Ruby

Bump sorbet-runtime from 0.5.12155 to 0.5.12157 in /steep #6990

Job	Run time
C99_compile (3.4)	59s
C99_compile (head)	1m 13s
test (3.1, test)	2m 46s
test (3.2, test)	2m 56s
valgrind	51m 22s
test (3.3, test)	3m 9s
test (3.4, test)	3m 2s
test (head, test)	3m 33s
test (head, stdlib_test rubocop)	2m 58s
test (3.4, stdlib_test)	2m 14s
test (3.4, test, --enable-frozen-string-literal)	2m 59s
test (3.4, stdlib_test, --enable-frozen-string-literal)	2m 21s
test (3.4, rubocop validate test_doc build test_generate_stdlib raap)	2m 51s
test (3.4, typecheck_test)	1m 14s
	1h 23m 37s

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