Correct link to btllib repository in README

Author: lcoombe

README.md

@@ -130,7 +130,7 @@ The expected output files can be found in: `tests/expected_outputs`
 
 ## Dependencies
 * Python 3.7+ ([Numpy](https://numpy.org/), [Python-igraph](https://igraph.org/python/))
-* [btllib](https://github.com/bcgsc/btllib) 1.7.1 or higher
+* [btllib](https://github.com/BirolLab/btllib) 1.7.1 or higher
 * [ABySS v2.3.0+](https://github.com/BirolLab/abyss)
 * GCC 6+ or Clang 5+ with OpenMP
 * [zlib](https://zlib.net/)