Disable some experimental features for dependabot (#170)

Author: markwallace-microsoft

.github/dependabot.yml

@@ -11,6 +11,9 @@ updates:
     schedule:
       interval: "cron"
       cronjob: "0 8 * * 4,0" # Every Thursday(4) and Sunday(0) at 8:00 UTC
+    experimental:  
+      nuget-native-updater: false
+      enable-cooldown-metrics-collection: false
     ignore:
       # For all System.* and Microsoft.Extensions/Bcl.* packages, ignore all major version updates
       - dependency-name: "System.*"