Test manual trigger (#1199)

* Update dotnet-core.yml

* try again

* removing for testing

* Revert "try again"

This reverts commit 71f09c1a70.

* Revert "removing for testing"

This reverts commit 7019937e33.

.github/workflows/dotnet-core.yml

@@ -1,6 +1,12 @@
 name: Pack and publish to Myget
 
 on:
+  workflow_dispatch:
+    inputs:
+      logLevel:
+        description: 'Log level'     
+        required: true
+        default: 'warning'
   schedule:
     - cron: '0 0 * * *' # once in a day at 00:00
   push: