patch 8.2.2391: memory leak when creating a global function with closure

Problem:    Memory leak when creating a global function with closure.
Solution:   Create a separate partial for every instantiated function.
diff --git a/src/version.c b/src/version.c
index 722c833..6bcd074 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2391,
+/**/
     2390,
 /**/
     2389,