fuzz: bump `bigdecimal` from `0.4.3` to `0.4.7` #5855

Job	Run time
Build the fuzzers	4m 10s
Run the fuzzers (fuzz_test, true)	4m 7s
Run the fuzzers (fuzz_date, false)	4m 3s
Run the fuzzers (fuzz_expr, true)	4m 11s
Run the fuzzers (fuzz_printf, false)	4m 8s
Run the fuzzers (fuzz_echo, true)	4m 9s
Run the fuzzers (fuzz_seq, false)	3m 12s
Run the fuzzers (fuzz_sort, false)	3m 10s
Run the fuzzers (fuzz_wc, false)	3m 4s
Run the fuzzers (fuzz_cut, false)	3m 18s
Run the fuzzers (fuzz_split, false)	3m 15s
Run the fuzzers (fuzz_tr, false)	3m 10s
Run the fuzzers (fuzz_env, false)	3m 6s
Run the fuzzers (fuzz_cksum, false)	3m 12s
Run the fuzzers (fuzz_parse_glob, true)	4m 5s
Run the fuzzers (fuzz_parse_size, true)	4m 1s
Run the fuzzers (fuzz_parse_time, true)	4m 4s
Run the fuzzers (fuzz_seq_parse_number, true)	3m 58s
	1h 6m 23s

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