Add quotation marks

Author: mernst

.github/dependabot.yml

@@ -1,10 +1,10 @@
 version: 2
 
 updates:
-- package-ecosystem: gradle
+- package-ecosystem: "gradle"
   directory: "/"
   schedule:
-    interval: daily
+    interval: "daily"
   open-pull-requests-limit: 10
   ignore:
   - dependency-name: com.amazonaws:aws-java-sdk-bom