ci(Mergify): configuration update (#966)

* ci(Mergify): configuration update

Signed-off-by: Ryan <me@hackerc.at>

* fix: check for maintainers only

.mergify.yml

@@ -82,7 +82,11 @@ pull_request_rules:
   - name: Automatic merge on approval
     conditions:
       - '#changes-requested-reviews-by=0'
+      - or:
           - 'approved-reviews-by=@nektos/act-committers'
+          - and:
+              - 'approved-reviews-by=@nektos/act-maintainers'
+              - '#approved-reviews-by>=3'
       - -draft
       - -merged
       - -closed