[MINOR] Fix link in timeseries transformer docs
Author: cakiki
Pull request: yes

I'm not sure this will also fix the currently broken link in the docs (Specifically here: https://huggingface.co/docs/transformers/model_doc/time_series_transformer) whereby clicking on `kashif` attempts to link to the following non-existent URL: https://huggingface.co/docs/transformers/model_doc/%3Chttps://huggingface.co/kashif

# What does this PR do?

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Fixes a broken link in the above-linked documentation.


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## Who can review?
I'm not sure. @sgugger or @osanseviero maybe?

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Comments:
_The documentation is not available anymore as the PR was closed or merged._

Link seems to work in the staging docs