patch 8.2.0976: some 'cpoptions' not tested

Problem:    Some 'cpoptions' not tested.
Solution:   Add more tests. (Yegappan Lakshmanan, closes #6253)
diff --git a/src/version.c b/src/version.c
index e9a0723..9f71e50 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    976,
+/**/
     975,
 /**/
     974,