fix link

Author: bicycle1885

README.md

@@ -1,6 +1,6 @@
 # Bio.jl Tutorial Notebooks
 
-* [Pairwise Alignment and Dotplot](https://nbviewer.jupyter.org/github/bicycle1885/BioTutorials/blob/master/Pairwise%20Alignment%20and%20Dotplot.ipynb)
+* [Pairwise Alignment and Dotplot](https://nbviewer.jupyter.org/github/bicycle1885/BioTutorials/blob/master/Pairwise%20Alignment%20and%20Dotplot/Pairwise%20Alignment%20and%20Dotplot.ipynb)
 * [RNA-Seq Coverage](https://nbviewer.jupyter.org/github/bicycle1885/BioTutorials/blob/master/RNA-Seq%20Coverage/RNA-Seq%20Coverage.ipynb)
 
 The programs under this repository are distributed in the public domain unless