chore(deps): bump the github_actions group across 1 directory with 3 updates

Bumps the github_actions group with 3 updates in the / directory: [actions/upload-artifact](https://github.com/actions/upload-artifact), [actions/download-artifact](https://github.com/actions/download-artifact) and [sigstore/gh-action-sigstore-python](https://github.com/sigstore/gh-action-sigstore-python).


Updates `actions/upload-artifact` from 5 to 6
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

Updates `actions/download-artifact` from 6 to 7
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v6...v7)

Updates `sigstore/gh-action-sigstore-python` from 3.1.0 to 3.2.0
- [Release notes](https://github.com/sigstore/gh-action-sigstore-python/releases)
- [Changelog](https://github.com/sigstore/gh-action-sigstore-python/blob/main/CHANGELOG.md)
- [Commits](sigstore/gh-action-sigstore-python@v3.1.0...v3.2.0)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github_actions
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github_actions
- dependency-name: sigstore/gh-action-sigstore-python
  dependency-version: 3.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github_actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/release-please.yml

@@ -28,7 +28,7 @@ jobs:
     - name: Build a binary wheel and a source tarball
       run: pipx run build
     - name: Store the distribution packages
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: python-package-distributions
         path: dist/
@@ -48,7 +48,7 @@ jobs:
       id-token: write # IMPORTANT: mandatory for trusted publishing
     steps:
     - name: Download all the dists
-      uses: actions/download-artifact@v6
+      uses: actions/download-artifact@v7
       with:
         name: python-package-distributions
         path: dist/
@@ -68,12 +68,12 @@ jobs:
       id-token: write # IMPORTANT: mandatory for sigstore
     steps:
     - name: Download all the dists
-      uses: actions/download-artifact@v6
+      uses: actions/download-artifact@v7
       with:
         name: python-package-distributions
         path: dist/
     - name: Sign the dists with Sigstore
-      uses: sigstore/gh-action-sigstore-python@v3.1.0
+      uses: sigstore/gh-action-sigstore-python@v3.2.0
       with:
         inputs: >-
           ./dist/*.tar.gz