patch 8.1.2090: not clear why channel log file ends

Problem:    Not clear why channel log file ends.
Solution:   Add a "closing" line.
diff --git a/src/version.c b/src/version.c
index 552f82a..e595c7a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2090,
+/**/
     2089,
 /**/
     2088,