patch 8.1.2146: build failure

Problem:    Build failure.
Solution:   Include omitted changed file.
diff --git a/src/version.c b/src/version.c
index 18509fd..a6a9439 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2146,
+/**/
     2145,
 /**/
     2144,