patch 8.2.4520: using wrong highlight for cursor line number

Problem:    Using wrong highlight for cursor line number.
Solution:   Take filler lines into account when using CursorLineNr.
            (closes #9897)
diff --git a/src/version.c b/src/version.c
index 800b8fc..9753167 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4520,
+/**/
     4519,
 /**/
     4518,