chore(deps): update actions/setup-dotnet action to v4 (#38)

Author: renovate[bot]

.github/workflows/pack.yml

@@ -17,7 +17,7 @@ jobs:
         fetch-depth: 0 # avoid shallow clone
 
     - name: Setup .NET
-      uses: actions/setup-dotnet@v3
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: 8.0.x