ENH: Update to quantecon-book-theme==0.6.1

[mmcky]

This PR updates to 0.6.1

https://github.com/QuantEcon/quantecon-book-theme/releases/tag/v0.6.1

[github-actions]

🚀 Deployed on https://652f4bf92260c342bff1ebae--epic-agnesi-957267.netlify.app

[mmcky]

@AakashGfude thanks for this.

Is there a way to use an inverted quantecon logo for dark theme?

Also is there a lighter colour we can use for the right hand table of contents

also the title

Looking like a big improvement thought. Thanks.

cc: @HumphreyYang @HengchengZhang

[AakashGfude]

Thanks @mmcky . Yes, I will add a lighter color. Since that image is jpg, so, if I invert the colour, the logo colour changes as well, for example:

We can either try to create a new image for dark mode, or use this?

Thanks for the right hand toc, will add the same styling as left-hand toc:

[mmcky]

@DrDrij has a QuantEcon logo for dark backgrounds. I will try and dig it up. But it would be great if we can use a different logo to support dark mode.

[mmcky]

@AakashGfude here is one for black backgrounds

[AakashGfude]

Thanks @mmcky . I will get it done next week. When I am back to Canberra

[mmcky]

closing as we will upgrade to 0.6.2 instead with improved dark theme support