Broken links in README ('Learning' and 'Get Started' sections)

[NicholasGillen]

Most appropriate sub-area of p5.js?

• Accessibility
• Color
• Core/Environment/Rendering
• Data
• DOM
• Events
• Image
• IO
• Math
• Typography
• Utilities
• WebGL
• Build process
• Unit testing
• Internationalization
• Friendly errors
• Other (specify if possible)

p5.js version

No response

Web browser and version

No response

Operating system

No response

Steps to reproduce this

In the Learning section of the README, the "Get Started" and "Learn" links both give a 404 error page (they are using the old archived site's URL, which doesn't map 1-to-1 to the new site).

"Learn" should instead point to here and "Get Started" should point here

Similarly, in the Get Started section of the README, the "Get Started" link gives a 404 error page as above.

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