docs: Fixing Documentation Typos

[mdqst]

Description

I’ve addressed a few minor errors and clarifications in the documentation to ensure accuracy and improve readability.
Here's a breakdown of the changes:

1. docs/onebox-test.md:

   • Fixed the incorrect use of "Changes" in the sentence:

     "Changes to the tests folder and run the following command to run all tests."
     Updated to:
     "Change to the tests folder and run the following command to run all tests."
     The imperative form "Change" is more appropriate in this context.

2. docs/run.md:

   • Added the missing definite article "the" for clarity:

     "Install dependencies Node.js, yarn, hardhat."
     Updated to:
     "Install the dependencies: Node.js, Yarn, and Hardhat."

3. docs/transaction-processing.md:

   • Corrected the term "trust execution environment (TEE)" to the more widely recognized "trusted execution environment (TEE)."

Thank you for considering my PR!

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