ci(Mergify): configuration update (crypto-org-chain#260)

Signed-off-by: yihuang <[email protected]>

.mergify.yml

@@ -0,0 +1,24 @@
+queue_rules:
+  - name: default
+    conditions:
+      - "#approved-reviews-by>1"
+
+pull_request_rules:
+  - name: automerge to the base branch with label automerge and branch protection passing
+    conditions:
+      - "#approved-reviews-by>1"
+      - base=main
+      - label=automerge
+    actions:
+      queue:
+        name: default
+      merge:
+        method: squash
+  - name: backport patches to v0.6.x branch
+    conditions:
+      - base=main
+      - label=backport/0.6.x
+    actions:
+      backport:
+        branches:
+          - release/v0.6.x