patch 8.2.5006: asan warns for undefined behavior

Problem:    Asan warns for undefined behavior.
Solution:   Cast the shifted value to unsigned.
diff --git a/src/version.c b/src/version.c
index f0ccd20..43390fa 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    5006,
+/**/
     5005,
 /**/
     5004,