unit 8 fixes - latex stuff and broken link minor corrections

[psetinek]

Some fixes for chapter 8:

• mainly latex related where I changed $...$ to \( ... \).
• fixed Rotation matrix around z-axis in the linear algebra mdx.
• fixed path to image for NeRF encodings in nerf mdx.

[bellabf]

Thank you!

For some housekeeping, the z-axis rotation fixes the issue #283

[sergiopaniego]

Could it be better if there was a space between the Latex text and the rest?
Like in here:

Reference: https://moon-ci-docs.huggingface.co/docs/computer-vision-course/pr_285/unit8/3d-vision/nvs

[bellabf]

Could it be better if there was a space between the Latex text and the rest? Like in here:

Reference: https://moon-ci-docs.huggingface.co/docs/computer-vision-course/pr_285/unit8/3d-vision/nvs

I actually do not really know how to fix this. There is a similar problem with image.mdx in unit 1. I found digging some other PR that it was mentioned #228 (comment) that the problem was from the docbuilder. Since multiple units have this problem, it would be better to fix the docbuilder.

Maybe @merveenoyan or @johko know more about this?

[merveenoyan]

@sergiopaniego @bellabf unfortunately this is an error on docbuilder's side

[merveenoyan]

@psetinek would you be down to maybe write HTML to center images and the text underneath?