Fix typos: dictio{ nn -> n }ar{y,ies}

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
diff --git a/rngparser.c b/rngparser.c
index e681e0c..7731d4d 100644
--- a/rngparser.c
+++ b/rngparser.c
@@ -95,7 +95,7 @@
     xmlHashTablePtr datatypes;
 
     /*
-     * dictionnary and keywords
+     * dictionary and keywords
      */
     xmlDictPtr     dict;
     const xmlChar *key_attribute;