patch 9.0.0676: CI on Mac M1 with gcc actually uses clang

Problem:    CI on Mac M1 with gcc actually uses clang.
Solution:   Remove the gcc task. (Ozaki Kiichi, closes #11297)
diff --git a/src/version.c b/src/version.c
index 3cf2ef9..5cf086e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    676,
+/**/
     675,
 /**/
     674,