docs: update hipstr link (#217)

* updating hipstr link

* updating hipstr link

---------

Co-authored-by: Melissa Gymrek <melissagymrek@Melissas-MacBook-Pro-2.local>
Co-authored-by: Arya Massarat <23412689+aryarm@users.noreply.github.com>

README.rst

@@ -122,7 +122,7 @@ TRTools supports VCFs from the following TR genotyping tools:
 * AdVNTR_
 * ExpansionHunter_
 * GangSTR_ version 2.4 or higher
-* HipSTR_
+* HipSTR [`main repo <https://github.com/tfwillems/HipSTR>`_] [`Gymrek Lab repo <https://github.com/gymrek-lab/hipstr>`_]
 * PopSTR_ version 2 or higher
 
 See our description of the `features and example use-cases <https://trtools.readthedocs.io/en/stable/CALLERS.html>`_ of each of these tools.