include notes describing the dependabot config

Author: deleonenriqueta

.github/workflows/dependabot.yml

@@ -1,3 +1,10 @@
+# Dependabot Configuration
+#
+# This configuration file specifies the settings for Dependabot Scanning.
+# It monitors the Gradle dependencies in the specified subprojects and runs checks
+# on a weekly basis. This will only provide vulnerability alerts and will not create
+# pull requests for version updates.
+
 version: 2
 updates:
   - package-ecosystem: "gradle"