Disable dependabot wasm alerts

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+
+# Only enable cargo, turn off npm from wasm example
+updates:
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    # disable regular version updates, security updates are unaffected
+    open-pull-requests-limit: 0