docs: Fix typos and grammar

[famouswizard]

Description

Key fixes include:

• Replaced “straight forward” → “straightforward”

• Fixed verb forms: “send” → “sent”, “executed” → “execute”

• Corrected article usage: “a uncle” → “an uncle”, added missing “the”

• Updated phrasing for clarity: “of given address” → “at a given address”

• Fixed technical typos:

  • Removed extra quote in curl example
  • Removed duplicate { in eth_getBlockByHash example

All examples and descriptions should now read more naturally and match standard English grammar.

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[wackerow]

Looks good! Thanks for the polishes @famouswizard =)