Update README.md

[martriay]

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Checklist

• [x] The URL is not already present in the list (check with CTRL/CMD+F in the raw markdown file).
• [ ] Each description starts with an uppercase character and ends with a period.
  Example: cairo - The Cairo programming language.
• [ ] Drop all A / An prefixes at the start of the description.
• [ ] Avoid using the word StarkNet in the description.