Update .asf.yaml (#85)

diff --git a/.asf.yaml b/.asf.yaml
index 31e4a2f..9c86a1b 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -24,6 +24,10 @@
     - tools
     - license
     - licensing
+  enabled_merge_buttons:
+    squash:  true
+    merge:   false
+    rebase:  false
   protected_branches:
     main:
       required_status_checks: