[ldm3d] Fixed small typo (#3820)

* fixed typo

* updated doc to be consistent in naming

* make style/quality

---------
Co-authored-by: Aflalo <estellea@isl-iam1.rr.intel.com>

docs/source/en/api/pipelines/stable_diffusion/ldm3d_diffusion.mdx

@@ -35,9 +35,9 @@ Running LDM3D is straighforward with the [`StableDiffusionLDM3DPipeline`]:
 ```python
 >>> from diffusers import StableDiffusionLDM3DPipeline
 
->>> pipe_ldm3d = StableDiffusionLDM3DPipeline.from_pretrained("Intel/ldm3d")
+>>> pipe = StableDiffusionLDM3DPipeline.from_pretrained("Intel/ldm3d")
 prompt ="A picture of some lemons on a table"
-output = pipe_ldm3d(prompt)
+output = pipe(prompt)
 rgb_image, depth_image = output.rgb, output.depth
 rgb_image[0].save("lemons_ldm3d_rgb.jpg")
 depth_image[0].save("lemons_ldm3d_depth.png")

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_ldm3d.py

@@ -49,7 +49,7 @@ EXAMPLE_DOC_STRING = """
         >>> pipe = pipe.to("cuda")
 
         >>> prompt = "a photo of an astronaut riding a horse on mars"
-        >>> output = pipe_ldm3d(prompt)
+        >>> output = pipe(prompt)
         >>> rgb_image, depth_image = output.rgb, output.depth
         ```
 """