Adding target 3.0.x

Signed-off-by: Joakim Erdfelt <joakim.erdfelt@gmail.com>

.github/dependabot.yml

@@ -38,6 +38,19 @@ updates:
       - dependency-name: "org.springframework:*"
         versions: [ ">=6.0.0" ]
 
+  - package-ecosystem: "maven"
+    directory: "/"
+    open-pull-requests-limit: 50
+    target-branch: "3.0.x"
+    commit-message:
+      prefix: "[3.0.x] "
+    schedule:
+      interval: "daily"
+    ignore:
+      # Do not upgrade major versions of dependencies
+      - dependency-name: "*"
+        update-types: [ "version-update:semver-major" ]
+
   - package-ecosystem: "maven"
     directory: "/"
     open-pull-requests-limit: 50