doc: Fix typo in build-unix.md #30744

1. 
   hebasto commented at 8:05 pm on August 28, 2024: member

   Addresses #30454 (review).
2. doc: Fix typo in `build-unix.md` e78551baec
3. 
   DrahtBot commented at 8:05 pm on August 28, 2024: contributor

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

   Code Coverage

   For detailed information about the code coverage, see the test coverage report.

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   See the guideline for information on the review process.

   Type	Reviewers
   ACK	l0rinc, davidgumberg, tdb3

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4. DrahtBot added the label Docs on Aug 28, 2024
5. l0rinc approved
6. 
   l0rinc commented at 8:08 pm on August 28, 2024: contributor

   ACK e78551baec1bd63192112a816cef8c207c049415
7. 
   davidgumberg commented at 11:05 pm on August 28, 2024: contributor

   ACK https://github.com/bitcoin/bitcoin/commit/e78551baec1bd63192112a816cef8c207c049415
8. tdb3 approved
9. 
   tdb3 commented at 2:59 am on August 29, 2024: contributor

   ACK e78551baec1bd63192112a816cef8c207c049415

   Received the warning before this fix. Warning gone after the fix.

   0CMake Warning:
   1  Manually-specified variables were not used by the project:
   2
   3    CMAKE_CC_COMPILER
   

10. fanquake merged this on Aug 29, 2024
11. fanquake closed this on Aug 29, 2024

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12. hebasto deleted the branch on Aug 29, 2024

Contributors
hebasto DrahtBot l0rinc davidgumberg tdb3

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