Update main_cd.yml (#150)

Author: FreakyAli

.github/workflows/main_cd.yml

@@ -4,7 +4,7 @@ on:
   push:
     tags:
     - "v[0-9]+.[0-9]+.[0-9]+"
-    - "v[0-9]+.[0-9]+.[0-9]+-preview[0-9]+"
+    - "v[0-9]+.[0-9]+.[0-9]+-pre[0-9]+"
 jobs:
   release-nuget: