Update dependabot.yml

Author: chrjohn

.github/dependabot.yml

@@ -8,6 +8,9 @@ updates:
     schedule:
       interval: "daily"
     open-pull-requests-limit: 10
+    ignore:
+      - dependency-name: "org.apache.mina:mina-core"
+        versions: ["<= 2.2.4"]  # Override the stale PR-comment ignore; allow any 2.2.5+ security fix
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule: