chore(doc): Update sims doc (backport #22258)

[mergify]

Description

Minor updates to docs/learn/advanced/12-simulation.md only

Author Checklist

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• included the correct type prefix in the PR title, you can find examples of the prefixes below:

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• included the necessary unit and integration tests

• added a changelog entry to CHANGELOG.md

• updated the relevant documentation or specification, including comments for documenting Go code

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• confirmed the correct type prefix in the PR title
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• reviewed state machine logic, API design and naming, documentation is accurate, tests and test coverage

Summary by CodeRabbit

• Documentation
  • Enhanced clarity and specificity in the Cosmos Blockchain Simulator documentation.
  • Added a hyperlink to "fuzz test" in the introduction.
  • Updated terminology from "commands" to "scenarios" for better accuracy.
  • Refined description of the AppStateDeterminism scenario for improved understanding.
  • Expanded explanations of simulator modes for flexibility in setups.
  • Minor readability improvements and reorganization of the debugging tips section.

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This is an automatic backport of pull request #22258 done by [Mergify](https://mergify.com).