Update index.html

Author: satishev

index.html

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 <a id="tools-released" class="anchor" href="#tools-released" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>Tools released</h3>
 <p><a href="https://github.com/radxtools/collageradiomics">CoLlAGe</a>: a new radiomics descriptor which captures subtle anisotropic differences in disease pathologies by measuring entropy of co-occurrences of voxel-level gradient orientations on imaging computed within a local neighborhood.</p>
+<p><a href="https://github.com/radxtools/topology-radiomics">Topology</a>: descriptors which capture subtle sharpness and curvature differences along the surface of diseased pathologies on imaging.</p>        
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 <a id="events" class="anchor" href="#events" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>Events</h3>