ci: bump actions/checkout version to v6 #34094

1. 
   Dahka2321 commented at 9:42 pm on December 17, 2025: contributor

   Updated actions/checkout from v5 to v6 in ci.yml workflow
2. Update ci.yml cd98caea43
3. 
   DrahtBot commented at 9:42 pm on December 17, 2025: contributor

   The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/34094.

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   Type	Reviewers
   ACK	fanquake

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4. fanquake renamed this:
   chore: bump checkout to v6
   ci: bump actions/checkout version to v6
   on Dec 18, 2025
5. DrahtBot added the label Tests on Dec 18, 2025
6. 
   fanquake commented at 12:20 pm on December 18, 2025: member

   ACK cd98caea438a61f1e2c6ea8331afa545478f8f94
7. fanquake merged this on Dec 18, 2025
8. fanquake closed this on Dec 18, 2025

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Dahka2321 DrahtBot fanquake

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Tests