doc: Fix error string typo #173

1. 
   hodlinator commented at 1:45 pm on May 13, 2025: contributor

   Found while reviewing https://github.com/bitcoin/bitcoin/pull/31375
2. doc: Fix error string typo

   Found while reviewing https://github.com/bitcoin/bitcoin/pull/31375

   44ee4b40b8
3. hebasto approved
4. 
   hebasto commented at 2:24 pm on May 13, 2025: member

   ACK 44ee4b40b89a14283485db0174b9ee1581fd2222.
5. ryanofsky approved
6. 
   ryanofsky commented at 2:08 pm on May 15, 2025: collaborator

   Code review ACK 44ee4b40b89a14283485db0174b9ee1581fd2222. Thanks for the fix!
7. ryanofsky merged this on May 15, 2025
8. ryanofsky closed this on May 15, 2025

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9. hodlinator deleted the branch on May 15, 2025
10. ryanofsky referenced this in commit 154af1eea1 on May 29, 2025
11. fanquake referenced this in commit 9393aeeca4 on May 30, 2025
12. saikiran57 referenced this in commit 8066d9c3d2 on Jul 28, 2025
13. janus referenced this in commit fcaf9ff8af on Sep 14, 2025

Contributors
hodlinator hebasto ryanofsky