Update README.md

Author: OJB-Quantum

README.md

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+Primary URL for the repository: [OJB-Quantum/Math-and-Physics-How-To](https://github.com/OJB-Quantum/Math-and-Physics-How-To)
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 ### In Case You Want Some Fun Open Access Interactive Tools to Try:
 - [Free Education](https://ojb-quantum.github.io/Free-Education)