Add "Brasil, Bolsa, Balcão" ([B]³) holidays #5110

Job	Run time
Run pre-commit	26s
CodeQL	1m 17s
Test Python 3.9 on macos-latest	43s
Test Python 3.10 on macos-latest	1m 1s
Test Python 3.11 on macos-latest	40s
Test Python 3.12 on macos-latest	48s
Test Python 3.13 on macos-latest	41s
Test Python 3.9 on ubuntu-latest	57s
Test Python 3.10 on ubuntu-latest	55s
Test Python 3.11 on ubuntu-latest	58s
Test Python 3.12 on ubuntu-latest	1m 30s
Test Python 3.13 on ubuntu-latest	1m 10s
Test Python 3.9 on windows-latest	1m 39s
Test Python 3.10 on windows-latest	1m 34s
Test Python 3.11 on windows-latest	1m 36s
Test Python 3.12 on windows-latest	2m 12s
Test Python 3.13 on windows-latest	2m 27s
Test docs build	33s
Build distribution	28s
Test build on macos-latest	27s
Test build on ubuntu-latest	49s
Test build on windows-latest	1m 58s
Publish generated artifacts	0s
	24m 49s

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