Update default values in ortho() docs, use default args in example

[davepagurek]

Resolves https://github.com/processing/p5.js/issues/6755

Changes

• Updates the documentation to mention that the default far value adds 800
• Removes the args from ortho in the example:
  • Its default far value wasn't suitable when copy-and-pasted into a larger sketch
  • Its y values were flipped vertically, also probably unexpected when copy-and-pasting
• Removes the camera(...) call: with the updated far value, the camera does not need to be placed closer to the objects to make them visible and have them continue to be visible when zooming/rotating a bit with orbitControl

Screenshots of the change

Before:

After:

PR Checklist

• [x] npm run lint passes
• x is included / updated
• are included / updated

[davepagurek]

@diyaayay since you updated this example last, let me know if you think these changes make sense to you!

[diyaayay]

@davepagurek Yes, I think these work well now. I should have updated the documentation while adding 800 to the default far value. Thanks for looking into this.