Update README.md

[naveenarun]

Add SolMATe (https://github.com/NTA-Capital/SolMATe) - it provides floating-point matrix manipulation, linear algebra operations, and vector math for smart contracts.

Checklist

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

[bkrem]

Great addition, thank you @naveenarun 🙏