fix: Add missing toml dependency to prevent release version skipping

- Add toml package to build dependencies in publish-pypi.yml
- Prevents ModuleNotFoundError during version verification
- Fixes root cause of v4.0.8 version skipping issue
- Ensures reliable PyPI release workflow execution

.github/workflows/publish-pypi.yml

@@ -45,7 +45,7 @@ jobs:
     - name: Install build dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install build twine
+        python -m pip install build twine toml
     
     - name: Verify package structure
       run: |