Fix of a typo in README.

Author: tvondra

README

@@ -55,7 +55,8 @@ Set it higher than you need, load all the dictionaries and check the
 log - after loading each dictionary, there's a LOG message with info
 about how much memory is available. Use that to tweak the GUC.
 
-The shared segment can contain seve
+The shared segment can contain several dictionaries at the same time,
+the amount of memory is the only limit.
 
 Using the dictionary
 --------------------