Fix Typos and Improve Consistency in Documentation

[Dimitrolito]

Summary

• Categories: docs

This pull request addresses several typographical errors and improves consistency in the documentation. The following changes were made:

Changelog

• Corrected "down time" to "downtime" in the networkEndpoints.md file.
• Replaced inconsistent spelling of "all of the" with "all the" in the foundryandfractal.md and hardhatandfractal.md files.

Testing

• Reviewed the affected files to ensure the corrections do not alter the technical meaning.
• Verified that all spelling and consistency issues were addressed across the relevant files.

[vercel]

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