Fix dependabot typo in mergify config

Author: hyperized

.mergify.yml

@@ -7,7 +7,7 @@ pull_request_rules:
         type: APPROVE
         message: Automatically approving dependabot
 
-  - name: automatic merge on depenabot pull requests
+  - name: automatic merge on dependabot pull requests
     conditions:
       - author=dependabot[bot]
       - check-success~=^test*