Fixes anitab-org#482

updated contact for #portal and AnitaB.org Open Source Zulip

Author: sayashraaj

README.md

@@ -176,3 +176,8 @@ For more information on semantics and builds, please refer to the Sphinx
 [official documentation](http://sphinx-doc.org/contents.html).
 
 You can view the requirements document [here](docs/requirements/Systers_GSoC14_Portal_Requirements.pdf).
+
+Contact
+-------------
+
+You can reach the maintainers and our community on [AnitaB.org Open Source Zulip](https://anitab-org.zulipchat.com/). If you are interested in contributing to the mentorship system, we have a dedicated stream for this project [#portal](https://anitab-org.zulipchat.com/#narrow/stream/222540-portal), where you can ask questions and interact with the community, join with us!