[docs] Fix step numbering in StableVideoDiffusionPipeline

[JinayJain]

What does this PR do?

Resolves some numbering inconsistencies in the SVD pipeline comments.

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[a-r-r-o-w]

Hi, thanks for the PR! I believe there is some overlap with #7087 which takes care of this as well

[JinayJain]

Hi, thanks for the PR! I believe there is some overlap with #7087 which takes care of this as well

Oh great! I'll close this PR then.