Change spelling to help Google

dloss · dloss · commit 4bd28d87deb4 · 2016-09-24T16:57:07.000+02:00
Some people (including me) might type "pentesting"
instead of "penetration testing" into a search engine.
So we make it appear in the description, which might help finding this site.
Moreover, it shortens that long sentence a little bit. :)
diff --git a/README.md b/README.md
@@ -2,7 +2,7 @@ Python tools for penetration testers
 ====================================
 
 If you are involved in vulnerability research, reverse engineering or
-penetration testing, I suggest to try out the
+pentesting, I suggest to try out the
 [Python](http://www.python.org) programming language. It has a rich set
 of useful libraries and programs. This page lists some of them.
 
