aquabeam OpenGL link broken

Hey 👋 - the link to the OpenGL writeup by _aquabeam_ seems to be broken, at least for me: https://www.aquabeam.me/manim/opengl_guide/ 

There are cached versions on the Wayback Machine: https://web.archive.org/web/20250708135737/https://www.aquabeam.me/manim/opengl_guide/

Can someone check to see if this is legit? I'm happy to add a documentation page with the content of the blogpost. 
