patch 8.2.1260: there is no good test for CursorHold

Problem:    There is no good test for CursorHold.
Solution:   Add a test.  Remove duplicated test. (Yegappan Lakshmanan,
            closes #6503
diff --git a/src/version.c b/src/version.c
index 528c8c0..8df1359 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1260,
+/**/
     1259,
 /**/
     1258,