ci(Mergify): configuration update

Signed-off-by: Kishan Gajjar - AWS <null>

Author: kg-aws

.mergify.yml

@@ -1,12 +1,10 @@
 queue_rules:
   - name: default
     merge_conditions:
-      # Conditions to get out of the queue (= merged)
       - status-success=Run Unit Tests
       - status-success=Semantic Pull Request
       - status-success=Analyze (javascript)
     merge_method: squash
-
 pull_request_rules:
   - name: Automatically merge on CI success and review approval
     conditions:
@@ -25,7 +23,6 @@ pull_request_rules:
     actions:
       queue:
         name: default
-
   - name: Automatically approve and merge Dependabot PRs
     conditions:
       - base=master
@@ -41,4 +38,6 @@ pull_request_rules:
       review:
         type: APPROVE
       queue:
-        name: default
+        name: default
+merge_queue:
+  max_parallel_checks: 1