Update .asf.yaml - fix spelling (#169)

.asf.yaml

diff --git a/.asf.yaml b/.asf.yaml
index 0a092c8..43f4b3e 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -37,7 +37,7 @@
       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