Do not bump Cargo version before releasing to PyPi

When we bump the version of Cargo.toml in CI we introduced an uncommited
change, and the state of the branch is then used to determine the PyPi
release version number.

Author: rlouf

.github/workflows/release_pypi.yaml

@@ -21,10 +21,6 @@ jobs:
         with:
           python-version: '3.10'
 
-      - name: Bump Cargo version
-        run: |
-          python ./.github/scripts/cargo_version_bumper.py --target Cargo.toml "${{ github.ref_name }}"
-
       - name: Set up QEMU
         if: runner.os == 'Linux'
         uses: docker/setup-qemu-action@v3