Fix PowerShell line continuation syntax in release workflow

[Copilot]

Description

Fixed PowerShell syntax error in the dotnet pack command at line 129 of .github/workflows/release.yaml. The command was missing a backtick (`) line continuation character, causing the multi-line command to be improperly parsed.

Change:

- dotnet pack src/Wolfgang.Etl.Abstractions/Wolfgang.Etl.Abstractions.csproj 
+ dotnet pack src/Wolfgang.Etl.Abstractions/Wolfgang.Etl.Abstractions.csproj `
  --no-build `

Type of change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Refactor

How Has This Been Tested?

• YAML syntax validation
• Automated code review

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Screenshots (if applicable)

N/A

Additional context

Addresses feedback from PR #41 review comment regarding improperly formatted PowerShell command that would fail during workflow execution.

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