Update to new roslyn version containing debug commands

Author: dibarbet

package.json

@@ -36,7 +36,7 @@
     }
   },
   "defaults": {
-    "roslyn": "4.8.0-1.23372.1",
+    "roslyn": "4.8.0-1.23381.8",
     "omniSharp": "1.39.7",
     "razor": "7.0.0-preview.23328.2",
     "razorOmnisharp": "7.0.0-preview.23363.1"