fix: typos in documentation files #31569

1. 
   vtjl10 commented at 2:54 pm on December 26, 2024: none

   This pull request contains changes to improve clarity, correctness and structure.

   Description correction: Corrected block chain to blockchain x2 Corrected OLD_CMAKE_REQURED_FLAGS to OLD_CMAKE_REQUIRED_FLAGS x4

   Please review the changes and let me know if any additional changes are needed.

2. Update JSON-RPC-interface.md 2bd6c29f4b
3. Update REST-interface.md f3d403fb77
4. Update CMakeLists.txt 8ad6e4aefe
5. 
   DrahtBot commented at 2:54 pm on December 26, 2024: 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/31569.

   Reviews

   See the guideline for information on the review process. A summary of reviews will appear here.

6. fanquake closed this on Dec 26, 2024

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vtjl10 DrahtBot