fix linebreaks in nuget readme

Author: goswinr

.github/workflows/release-nuget.yml

@@ -18,6 +18,12 @@ jobs:
       with:
         dotnet-version: '9.x'
 
+    - name: Replace <br> in README.md with two spaces for nuget.org
+      run: |
+        $content = Get-Content -Path README.md -Raw
+        $content = $content -replace "<br>", "  "
+        Set-Content -Path README.md -Value $content    
+
     - name: dotnet build
       run: dotnet build --configuration Release