Replace deprecated actions/create-release@v1 with softprops/action-gh-release@v2

[Copilot]

Addresses review feedback to replace the deprecated actions/create-release@v1 action in the release workflow.

Changes

• Replaced actions/create-release@v1 with softprops/action-gh-release@v2
• Updated release_name parameter to name per the new action's API
• Removed redundant GITHUB_TOKEN env block (action uses it automatically via workflow permissions)

# Before
- name: Create GitHub Release
  uses: actions/create-release@v1
  env:
    GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  with:
    release_name: "Release ${{ github.event.inputs.release_version }}"

# After
- name: Create GitHub Release
  uses: softprops/action-gh-release@v2
  with:
    name: "Release ${{ github.event.inputs.release_version }}"

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