patch 8.1.0872: confusing condition

Problem:    Confusing condition.
Solution:   Use "==" instead of "<=".
diff --git a/src/version.c b/src/version.c
index 3d24067..71fd1c1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -784,6 +784,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    872,
+/**/
     871,
 /**/
     870,