Update v.edit.html (#208)

"Intput" is a misspelling.

vector/v.edit/v.edit.html

@@ -413,7 +413,7 @@ v.edit map=roads tool=select bbox=598260,4919730,605100,4926240 query=length thr
 
 <h3>Fix height of contours</h3>
 
-Intput vector map contains 2D lines representing contours. Height can
+Input vector map contains 2D lines representing contours. Height can
 be assign to the contours using tool <b>zbulk</b>. First of all 2D
 lines need to be converted to 3D lines: