Fix typos and improve consistency in documentation #31508

1. 
   Dimitrolito commented at 3:07 pm on December 16, 2024: none

   This pull request addresses several typographical errors and ensures consistency in terminology across the Bitcoin Core documentation.

   Changes include:

   • Replacing “block chain” with the correct term “blockchain” in multiple documentation files.
   • Correcting the article usage from “a” to “an” where necessary, specifically before “XP”.
   • Minor grammatical improvements, such as adding “an” instead of “a” in contexts where the following word starts with a vowel sound.

   Affected files:

   • doc/JSON-RPC-interface.md
   • doc/REST-interface.md
   • doc/release-notes/release-notes-0.13.2.md
   • doc/release-notes/release-notes-0.12.1.md
   • doc/release-notes/release-notes-0.6.3.md
   • doc/release-notes/release-notes-0.8.0.md
   • doc/release-notes/release-notes-0.9.2.md

   These changes help maintain the clarity and professionalism of the Bitcoin Core documentation, ensuring more accurate and consistent terminology throughout.

2. typos JSON-RPC-interface.md d29962b291
3. typos REST-interface.md eb2b3c6162
4. typos release-notes-0.13.2.md 14cf15b0a9
5. typos release-notes-0.12.1.md 5df3f4adbf
6. typos release-notes-0.6.3.md a7c8919cdf
7. typos release-notes-0.8.0.md 7c99c224ef
8. typos release-notes-0.9.2.md dde8066563
9. 
   DrahtBot commented at 3:07 pm on December 16, 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/31508.

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

10. 
    maflcko commented at 3:14 pm on December 16, 2024: member

    ai slop
11. maflcko closed this on Dec 16, 2024

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Contributors
Dimitrolito DrahtBot maflcko