[`Docs`] Fix typos, improve, update at Using Diffusers' Task page (#5611)
* Fix typos, improve, update; kandinsky doesn't want fp16 due to deprecation; ogkalu and kohbanye don't have safetensor; add make_image_grid for better visualization
* Update inpaint.md
* Remove erronous Space
* Update docs/source/en/using-diffusers/conditional_image_generation.md
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>
* Update img2img.md
* load_image() already converts to RGB
* Update depth2img.md
* Update img2img.md
* Update inpaint.md
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Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>