Specify directory for dependabot to look for pom.xml files

Change-Id: Ida0a0ca02c6d25f9a981d185cc68b5f9cbfcee10
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 0010f5b..7eca83d 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -6,5 +6,6 @@
 version: 2
 updates:
   - package-ecosystem: "maven" # See documentation for possible values
+    directory: "/"
     schedule:
       interval: "daily"