Update packages.yml for version 3.0.1

The packages.yml workflow file has been updated to target the v3.0.1 branch instead of main. The version also has been updated from 3.0.0 to 3.0.1 in the version prediction logic. Hotfix tags usage has been removed.

.github/workflows/packages.yml

@@ -3,9 +3,7 @@ on:
   workflow_dispatch:
   push:
     branches:
-      - main
-    tags:
-      - hotfix-* # e.g. 3.0.0-hotfix-1
+      - v3.0.1
   release:
     types: [ prereleased, published ]
 env:
@@ -31,7 +29,7 @@ jobs:
             TAG_NAME=${TAG_NAME#refs/tags/} # remove the refs/tags/ prefix
             echo "VERSION=${TAG_NAME}" >> $GITHUB_ENV
           else
-            echo "VERSION=3.0.0-preview.${{github.run_number}}" >> $GITHUB_ENV
+            echo "VERSION=3.0.1-preview.${{github.run_number}}" >> $GITHUB_ENV
           fi
       - name: Build
         run: dotnet build --configuration Release /p:Version=${VERSION}