Fixed typos

[MonkeyKing44]

Files updated:

• /README.md line: 24

• /README.md line: 40

• /why-stx.md line: 14

• /sBTC/clarity_vm.md line: 44

• /sBTC/nakamoto.md line: 81

• /sBTC/nakamoto/block_signing_announcement.md line: 113

• /sBTC/nakamoto/block_signing_announcement.md line: 113

• /sBTC/nakamoto/block_signing_announcement.md line: 125

• /sBTC/nakamoto/extensions/overdue_term.md line: 5

• /sBTC/nakamoto/testing/stacks_block_storage_trait.md line: 7

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