Fix docs typo
diff --git a/flags.go b/flags.go
index e3e72a3..9d7d571 100644
--- a/flags.go
+++ b/flags.go
@@ -102,7 +102,7 @@
     env-delim:      the 'env' default value from environment is split into
                     multiple values with the given delimiter string, use with
                     slices and maps (optional)
-    value-name:     the name of the argument value (to be shown in the help,
+    value-name:     the name of the argument value (to be shown in the help)
                     (optional)
 
     base: a base (radix) used to convert strings to integer values, the