ci: use a 8x instance over 16x for riscv job #35640

1. 
   fanquake commented at 10:40 AM on July 2, 2026: member

   Follows up to #31425 (review).

2. ci: use a 8x instance over 16x 9a25bc3989
3. ci: use true|false over "true|false" 47bbed052e
4. DrahtBot added the label Tests on Jul 2, 2026
5. 
   DrahtBot commented at 10:40 AM on July 2, 2026: contributor

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

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   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/35640.

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6. fanquake marked this as ready for review on Jul 2, 2026
7. fanquake requested review from willcl-ark on Jul 2, 2026
8. sedited approved
9. 
   sedited commented at 6:21 PM on July 2, 2026: contributor

   ACK 47bbed052e0cb0b13f2ef94e4de471e79bdd5a74

10. fanquake merged this on Jul 3, 2026
11. fanquake closed this on Jul 3, 2026

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12. fanquake deleted the branch on Jul 3, 2026

Review Requested
willcl-ark