Fix logo.

Author: Victor O. Alvarez

README.md

@@ -1,3 +1,3 @@
-<img src="https://github.com/victoroalvarez/random-strings-python/blob/master/dice-151867_640.png" width="100">
 # random-strings
 Random short string generator
+<img src="https://github.com/victoroalvarez/random-strings-python/blob/master/dice-151867_640.png" width="150">