[MINOR] Fix link in timeseries transformer docs (#21602)

[MINOR] Fix link

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

docs/source/en/model_doc/time_series_transformer.mdx

@@ -53,7 +53,7 @@ of the context as initial input for the decoder).
 which is then fed to the decoder in order to make the next prediction (also called autoregressive generation).
 
 
-This model was contributed by [kashif](<https://huggingface.co/kashif).
+This model was contributed by [kashif](https://huggingface.co/kashif).
 
 
 ## TimeSeriesTransformerConfig