Update index.rst to rst format

Author: skjerns

doc/index.rst

@@ -18,7 +18,7 @@ Why?
 MNE-BIDS links BIDS and MNE-Python with the goal to make your analyses faster to code and more robust,
 and to facilitate data and code sharing with co-workers and collaborators.
 
-Having your data in BIDS format also allows the use of automated pipelines, for example [mne-bids-pipeline](https://mne.tools/mne-bids-pipeline/).
+Having your data in BIDS format also allows the use of automated pipelines, for example `mne-bids-pipeline <https://mne.tools/mne-bids-pipeline/>`_.
 
 What is this BIDS thing, anyway?
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