Add dependabot config for Java deps

This adds a dependabot configuration for our Java dependencies.

Author: JordonPhillips

.github/dependabot.yml

@@ -3,4 +3,14 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "weekly"
+  - package-ecosystem: "gradle"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "wednesday"
+    groups:
+      gradle:
+        update-types:
+          - "minor"
+          - "patch"