fix release.yml (#97)

Author: Yusuke Oda

.github/workflows/release.yml

@@ -17,8 +17,8 @@ jobs:
           python-version: "3.10"
       - name: build
         run: |
-          echo "__version__ = \"${GITHUB_REF_NAME:1}\"" > src/latexify/_version.py
-          python -m pip install --upgrade build
+          python -m pip install --upgrade build hatch
+          python -m hatch version "${GITHUB_REF_NAME}"
           python -m build
       - name: publish
         uses: pypa/gh-action-pypi-publish@release/v1