chore: bump maintenance versions in mergify

.mergify.yml

@@ -18,41 +18,41 @@ pull_request_rules:
             git merge upstream/{{base}}
             git push upstream {{head}}
             ```
-  - name: backport patches to 8.2 branch
+  - name: backport patches to 8.3 branch
     conditions:
       - merged
       - base=main
-      - label=backport-v8.2.0
+      - label=backport-v8.3.0
     actions:
       backport:
         assignees:
           - "{{ author }}"
         branches:
-          - "8.2"
+          - "8.3"
         title: "[{{ destination_branch }}](backport #{{ number }}) {{ title }}"
-  - name: backport patches to 8.1 branch
+  - name: backport patches to 8.2 branch
     conditions:
       - merged
       - base=main
-      - label=backport-v8.1.0
+      - label=backport-v8.2.0
     actions:
       backport:
         assignees:
           - "{{ author }}"
         branches:
-          - "8.1"
+          - "8.2"
         title: "[{{ destination_branch }}](backport #{{ number }}) {{ title }}"
-  - name: backport patches to 7.17 branch
+  - name: backport patches to 8.1 branch
     conditions:
       - merged
       - base=main
-      - label=backport-v7.17.0
+      - label=backport-v8.1.0
     actions:
       backport:
         assignees:
           - "{{ author }}"
         branches:
-          - "7.17"
+          - "8.1"
         title: "[{{ destination_branch }}](backport #{{ number }}) {{ title }}"
   - name: delete head branch after merge
     conditions: