Match dependabot definition to GitHub docs (#245)

.github/dependabot.yml

@@ -1,18 +1,23 @@
+# Per https://docs.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates
 version: 2
 updates:
-- package-ecosystem: "maven"
-  directory: "/"
-  schedule:
-    interval: "monthly"
-  reviewers:
-  - MarkEWaite
-  labels:
-  - skip-changelog
-- package-ecosystem: "github-actions"
-  directory: /
-  schedule:
-    interval: "monthly"
-  reviewers:
-  - MarkEWaite
-  labels:
-  - skip-changelog
+
+  # Maintain dependencies for maven
+  - package-ecosystem: "maven"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+    target-branch: "master"
+    reviewers:
+      - "MarkEWaite"
+    labels:
+      - "dependencies"
+
+  # Maintain dependencies for GitHub actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    labels:
+      - "skip-changelog"