ci: moar backport labels

[skip ci]

.mergify.yml

@@ -17,6 +17,36 @@ pull_request_rules:
             @{{author}}, thanks for the contribution, but we do not accept pull requests on a stable branch. Please raise PR on an appropriate hotfix branch.
             https://github.com/frappe/erpnext/wiki/Pull-Request-Checklist#which-branch
 
+  - name: backport to develop
+    conditions:
+      - label="backport develop"
+    actions:
+      backport:
+        branches:
+          - develop
+        assignees:
+          - "{{ author }}"
+
+  - name: backport to version-14-hotfix
+    conditions:
+      - label="backport version-14-hotfix"
+    actions:
+      backport:
+        branches:
+          - version-14-hotfix
+        assignees:
+          - "{{ author }}"
+
+  - name: backport to version-14-pre-release
+    conditions:
+      - label="backport version-14-pre-release"
+    actions:
+      backport:
+        branches:
+          - version-14-pre-release
+        assignees:
+          - "{{ author }}"
+
   - name: backport to version-13-hotfix
     conditions:
       - label="backport version-13-hotfix"