Fix release notes heredoc indentation and remove invalid GITHUB_OUTPUT line

Author: kevbite

.github/workflows/continuous-integration-workflow.yml

@@ -59,25 +59,23 @@ jobs:
         dotnet nuget push ./artifacts/*.nupkg --source NuGet.org --api-key ${{ secrets.NUGET_API_KEY }}
     - name: Generate release notes with NuGet links
       if: ${{ env.PUBLISH_PACKAGE }}
-      id: release_notes
       run: |
-        cat > release_notes.md << 'EOF'
-        ## NuGet Packages
-         
-        This release includes the following NuGet packages:
-         
-        - [CompaniesHouse](https://www.nuget.org/packages/CompaniesHouse/${{ env.VERSION }}) - Core .NET client for Companies House API
-        - [CompaniesHouse.Extensions.Microsoft.DependencyInjection](https://www.nuget.org/packages/CompaniesHouse.Extensions.Microsoft.DependencyInjection/${{ env.VERSION }}) - DI helpers for ASP.NET Core / generic-host apps
-         
-        Install via:
-        ```
-        dotnet add package CompaniesHouse
-        dotnet add package CompaniesHouse.Extensions.Microsoft.DependencyInjection
-        ```
-         
-        See the [README](https://github.com/kevbite/CompaniesHouse.NET#readme) for usage instructions.
-        EOF
-        echo "release_body=$(cat release_notes.md)" >> $GITHUB_OUTPUT
+        cat > release_notes.md <<EOF
+## NuGet Packages
+
+This release includes the following NuGet packages:
+
+- [CompaniesHouse](https://www.nuget.org/packages/CompaniesHouse/${{ env.VERSION }}) - Core .NET client for Companies House API
+- [CompaniesHouse.Extensions.Microsoft.DependencyInjection](https://www.nuget.org/packages/CompaniesHouse.Extensions.Microsoft.DependencyInjection/${{ env.VERSION }}) - DI helpers for ASP.NET Core / generic-host apps
+
+Install via:
+\`\`\`
+dotnet add package CompaniesHouse
+dotnet add package CompaniesHouse.Extensions.Microsoft.DependencyInjection
+\`\`\`
+
+See the [README](https://github.com/kevbite/CompaniesHouse.NET#readme) for usage instructions.
+EOF
     - name: Create Release
       id: create_release
       if: ${{ env.PUBLISH_PACKAGE }}