chore(deps): bump the actions group across 1 directory with 2 updates

Bumps the actions group with 2 updates in the / directory: [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel) and [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance).


Updates `pypa/cibuildwheel` from 2.20 to 2.21
- [Release notes](https://github.com/pypa/cibuildwheel/releases)
- [Changelog](https://github.com/pypa/cibuildwheel/blob/main/docs/changelog.md)
- [Commits](pypa/cibuildwheel@v2.20...v2.21)

Updates `actions/attest-build-provenance` from 1.4.3 to 1.4.4
- [Release notes](https://github.com/actions/attest-build-provenance/releases)
- [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md)
- [Commits](actions/attest-build-provenance@1c608d1...ef24412)

---
updated-dependencies:
- dependency-name: pypa/cibuildwheel
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
- dependency-name: actions/attest-build-provenance
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/emscripten.yaml

@@ -22,7 +22,7 @@ jobs:
         submodules: true
         fetch-depth: 0
 
-    - uses: pypa/cibuildwheel@v2.20
+    - uses: pypa/cibuildwheel@v2.21
       env:
         PYODIDE_BUILD_EXPORTS: whole_archive
       with:

.github/workflows/pip.yml

@@ -103,7 +103,7 @@ jobs:
     - uses: actions/download-artifact@v4
 
     - name: Generate artifact attestation for sdist and wheel
-      uses: actions/attest-build-provenance@1c608d11d69870c2092266b3f9a6f3abbf17002c # v1.4.3
+      uses: actions/attest-build-provenance@ef244123eb79f2f7a7e75d99086184180e6d0018 # v1.4.4
       with:
         subject-path: "*/pybind11*"