Ruby

Bump bigdecimal from 3.2.0 to 3.2.1 in /steep #6961

Job	Run time
C99_compile (3.4)	57s
C99_compile (head)	1m 16s
test (3.1, test)	2m 51s
valgrind	51m 28s
test (3.2, test)	2m 52s
test (3.3, test)	3m 16s
test (3.4, test)	3m 1s
test (head, test)	3m 30s
test (head, stdlib_test rubocop)	3m 24s
test (3.4, stdlib_test)	2m 33s
test (3.4, test, --enable-frozen-string-literal)	3m 11s
test (3.4, stdlib_test, --enable-frozen-string-literal)	2m 27s
test (3.4, rubocop validate test_doc build test_generate_stdlib raap)	2m 44s
test (3.4, typecheck_test)	1m 17s
	1h 24m 47s

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