replace trailing whitespace with blackslash in README.md

As an alternative to the markdown trailing whitespace as a line
break, we use a trailing blackslash as a markdown line break.

1996/august/README.md

@@ -1,6 +1,6 @@
 # Best of Show
 
-Lennart Augustsson   
+Lennart Augustsson\
 <https://web.archive.org/web/20090831055828/http://www.cs.chalmers.se/~augustss>