[docs] AnimateDiff Video-to-Video (#6712)

* add animatediff vid2vid to docs

* Update docs/source/en/api/pipelines/animatediff.md
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

* apply suggestions from review

---------
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

docs/source/en/api/pipelines/animatediff.md

@@ -118,7 +118,7 @@ from PIL import Image
 adapter = MotionAdapter.from_pretrained("guoyww/animatediff-motion-adapter-v1-5-2", torch_dtype=torch.float16)
 # load SD 1.5 based finetuned model
 model_id = "SG161222/Realistic_Vision_V5.1_noVAE"
-pipe = AnimateDiffVideoToVideoPipeline.from_pretrained(model_id, motion_adapter=adapter, torch_dtype=torch.float16)
+pipe = AnimateDiffVideoToVideoPipeline.from_pretrained(model_id, motion_adapter=adapter, torch_dtype=torch.float16).to("cuda")
 scheduler = DDIMScheduler.from_pretrained(
     model_id,
     subfolder="scheduler",
@@ -413,14 +413,12 @@ Make sure to check out the Schedulers [guide](../../using-diffusers/schedulers)
 [[autodoc]] AnimateDiffPipeline
   - all
   - __call__
-    - enable_freeu
-    - disable_freeu
-    - enable_free_init
-    - disable_free_init
-    - enable_vae_slicing
-    - disable_vae_slicing
-    - enable_vae_tiling
-    - disable_vae_tiling
+
+## AnimateDiffVideoToVideoPipeline
+
+[[autodoc]] AnimateDiffVideoToVideoPipeline
+  - all
+  - __call__
 
 ## AnimateDiffPipelineOutput