Update errata.rst

Author: amitsaha

content/pages/errata.rst

@@ -11,7 +11,7 @@ and the y-axis displays force".
 (Thanks to Mike Beasley for pointing this out)
 
 On Page 48, Figure 2-12 caption should be "Figure 2-12: Visualization of the relationship between the gravitational force and 
-the distance" anot not "..squared distance".
+the distance" and not "..squared distance".
 
 On Page 52, in the paragraph starting with "In this program...", the book currently states, 
 ".. we calculate the time of flight and then call the frange() function with the values for start, final, and