Update dependabot.yml

Author: Harmanpreet-Microsoft

.github/dependabot.yml

@@ -5,7 +5,20 @@
 
 version: 2
 updates:
-  - package-ecosystem: "pip" # See documentation for possible values
-    directory: "/" # Location of package manifests
+  - package-ecosystem: "npm" # for frontend dependencies
+    directory: "/frontend"  
     schedule:
-      interval: "weekly"
+      interval: "monthly"
+    commit-message:
+      prefix: "build"
+    target-branch: "dependabotchanges"
+    open-pull-requests-limit: 10
+
+  - package-ecosystem: "pip" # for backend dependencies
+    directory: "/"   
+    schedule:
+      interval: "monthly"
+    commit-message:
+      prefix: "build"
+    target-branch: "dependabotchanges"
+    open-pull-requests-limit: 10