chore: update mergify and dependabot (#2347)

init commit

Author: insumity

.github/dependabot.yml

@@ -68,3 +68,12 @@ updates:
     labels:
       - dependencies
 
+  - package-ecosystem: gomod
+    directory: "/"
+    schedule:
+      interval: daily
+    target-branch: "release/v6.2.x"
+    # Only allow automated security-related dependency updates on release branches.
+    open-pull-requests-limit: 0
+    labels:
+      - dependencies

.mergify.yml

@@ -50,3 +50,11 @@ pull_request_rules:
       backport:
         branches:
           - release/v6.1.x
+  - name: Backport patches to the release/v6.2.x branch
+    conditions:
+      - base=main
+      - label=A:backport/v6.2.x
+    actions:
+      backport:
+        branches:
+          - release/v6.2.x