Add --auto to install line for langs since there are deps now.

Author: dvanhorn

www/software.scrbl

@@ -268,7 +268,7 @@ library.
 
 To install, run the following command:
 
-@verbatim|{raco pkg install 'https://github.com/cmsc430/www.git?path=langs#main'}|
+@verbatim|{raco pkg install --auto 'https://github.com/cmsc430/www.git?path=langs#main'}|
 
 To test the package works as expected, run: