fix minor typo

transhumanism.mdwn

@@ -10,7 +10,7 @@ believe in directly applying existing technology towards transhumanist
 technology projects that are either presently possible, near-term possible or
 long-term possible.
 
-Other definitions of trnashumanism often leave out the dirty details of how to
+Other definitions of transhumanism often leave out the dirty details of how to
 make technology. Generally, the future isn't going to create the technology and
 then send everything to you. The alternative is to focus on transhumanist
 engineering projects through engineering and other participation.