Add Maven dependencies to dependabot.

Signed-off-by: James R. Perkins <jperkins@ibm.com>

Author: jamezp

.github/dependabot.yml

@@ -1,5 +1,10 @@
 version: 2
 updates:
+  - package-ecosystem: "maven"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    open-pull-requests-limit: 10
   - package-ecosystem: "github-actions"
     # Workflow files stored in the
     # default location of `.github/workflows`