Update .asf.yaml - fix spelling (#364)

.asf.yaml

diff --git a/.asf.yaml b/.asf.yaml
index e1f3a4d..b59a465 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -33,7 +33,7 @@
       required_status_checks:
         strict: false
       required_pull_request_reviews:
-        required_appoving_review_count: 1
+        required_approving_review_count: 1
       required_signatures: false
   enabled_merge_buttons:
     merge: false