github: point dependabot at live-editor (#743)

same as d8b9883, but pointing at
another place where we have javascript dependencies.

Signed-off-by: Ciro S. Costa <ciroscosta@vmware.com>

.github/dependabot.yml

@@ -38,3 +38,9 @@ updates:
     schedule:
       interval: daily
       time: "00:00"
+  - package-ecosystem: npm
+    labels: ["dependencies"]
+    directory: /experimental/live-editor
+    schedule:
+      interval: daily
+      time: "00:00"