patch 9.0.0861: solution for "!!sort" in closed fold is not optimal

Problem:    Solution for "!!sort" in closed fold is not optimal.
Solution:   Use a different range instead of the subtle difference in handling
            a range with an offset. (issue #11487)
diff --git a/src/version.c b/src/version.c
index 0e991a3..dd69273 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    861,
+/**/
     860,
 /**/
     859,