CI/CD

Update United Kingdom & Isle of Man holidays: add l10n support #5627

Job	Run time
Run pre-commit	27s
CodeQL	1m 39s
Test Python 3.9 on macos-latest	52s
Test Python 3.10 on macos-latest	1m 5s
Test Python 3.11 on macos-latest	41s
Test Python 3.12 on macos-latest	48s
Test Python 3.13 on macos-latest	43s
Test Python 3.9 on ubuntu-latest	54s
Test Python 3.10 on ubuntu-latest	1m 0s
Test Python 3.11 on ubuntu-latest	56s
Test Python 3.12 on ubuntu-latest	1m 16s
Test Python 3.13 on ubuntu-latest	57s
Test Python 3.9 on windows-latest	1m 53s
Test Python 3.10 on windows-latest	1m 54s
Test Python 3.11 on windows-latest	1m 59s
Test Python 3.12 on windows-latest	2m 26s
Test Python 3.13 on windows-latest	1m 50s
Test docs build	29s
Build distribution	17s
Test build on macos-latest	27s
Test build on ubuntu-latest	38s
Test build on windows-latest	2m 5s
Publish generated artifacts	0s
Create SHA1 checksums and Sigstore signatures	0s
Update GitHub release with SBOM and signed artifacts	0s
	25m 16s

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