Update README.rst

Author: lmcinnes

README.rst

@@ -9,7 +9,7 @@
 Fast Multicore HDBSCAN
 ======================
 
-Ahe ``fast_hdbscan`` library provides a simple implementation of the HDBSCAN clustering algorithm designed specifically
+The ``fast_hdbscan`` library provides a simple implementation of the HDBSCAN clustering algorithm designed specifically
 for high performance on multicore machine with low dimensional data (2D to about 20D). The algorithm runs in parallel and can make
 effective use of as many cores as you wish to throw at a problem. It is thus ideal for large SMP systems, and even
 modern multicore laptops.