Update summary.md

Author: deliahu

docs/summary.md

@@ -2,7 +2,7 @@
 
 * [Deploy machine learning models in production](../README.md)
 * [Install](cluster/install.md)
-* [GitHub](https://github.com/cortexlabs/cortex/tree/master)  <!-- CORTEX_VERSION_MINOR -->
+* [GitHub](https://github.com/cortexlabs/cortex)
 * [Examples](https://github.com/cortexlabs/cortex/tree/master/examples)  <!-- CORTEX_VERSION_MINOR -->
 * [We're hiring](https://angel.co/cortex-labs-inc/jobs)
 * [Email us](mailto:hello@cortex.dev)