patch 8.0.0766: option test fails with +terminal feature

Problem:    Option test fails with +terminal feature.
Solution:   Fix using the right option when checking the value.
diff --git a/src/version.c b/src/version.c
index 34017d1..8d698c7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    766,
+/**/
     765,
 /**/
     764,