Merge pull request #1278 from CosmWasm/mergify_update

Update mergify backport settings

.mergify.yml

@@ -4,11 +4,19 @@ queue_rules:
       - "#approved-reviews-by>0"
 
 pull_request_rules:
-  - name: backport patches to sdk47 feature branch
+  - name: backport patches to main branch
+    conditions:
+      - base=releases/v0.3x
+      - label=backport/main
+    actions:
+      backport:
+        branches:
+          - main
+  - name: backport patches to sdk45 release branch
     conditions:
       - base=main
-      - label=backport/sdk47-dev
+      - label=backport/v0.3x
     actions:
       backport:
         branches:
-          - develop_sdk47
+          - releases/v0.3x