Fixed typehint in `types.rst` and replaced outdated reference to `manim.typing.Image` with `manim.typing.PixelArray`#3878

chopan050 merged 2 commits intoManimCommunity:mainManimCommunity/manim:mainfrom

JasonGrace2282:fix-guideJasonGrace2282/manim:fix-guideCopy head branch name to clipboard