patch 8.2.2707: adding a lot of completions can still be a bit slow

Problem:    Adding a lot of completions can still be a bit slow.
Solution:   Add the check for CP_FAST. (Ben Jackson)
diff --git a/src/version.c b/src/version.c
index 92e3b4c..754e607 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2707,
+/**/
     2706,
 /**/
     2705,