links in markdown files refer to inline_documentation and tutorials are broken

[lirenjie95]

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

1.11.2

Web browser and version

Microsoft Edge for Business 131.0.2903.146 (Official build) (64-bit)

Operating system

Windows

Steps to reproduce this

Steps:

Part 1:

1. Go to: .github/PULL_REQUEST_TEMPLATE.md
2. Click on the link to the Inline documentation
3. Get a 404 error

Part 2:

1. Go to README.md
2. Click on the link to the tutorials
3. Get a 404 error

Solutions:

Replace listed broken links to the correct links.

1. https://github.com/processing/p5.js/blob/main/contributor_docs/inline_documentation.md should be replaced by https://github.com/processing/p5.js/blob/main/contributor_docs/contributing_to_the_p5js_reference.md
2. https://p5js.org/learn should be replaced by https://p5js.org/tutorials

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[lirenjie95]

Can you please assign this issue to me?