patch 8.1.0583: using illogical name for get_dict_number()/get_dict_string()

Problem:    Using illogical name for get_dict_number()/get_dict_string().
Solution:   Rename to start with dict_.
diff --git a/src/version.c b/src/version.c
index a0ffd4e..1c85bf1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -800,6 +800,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    583,
+/**/
     582,
 /**/
     581,