Bump pypa/cibuildwheel in the github_actions group across 1 directory

Bumps the github_actions group with 1 update in the / directory: [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel).


Updates `pypa/cibuildwheel` from 2.19.2 to 2.21.1
- [Release notes](https://github.com/pypa/cibuildwheel/releases)
- [Changelog](https://github.com/pypa/cibuildwheel/blob/main/docs/changelog.md)
- [Commits](pypa/cibuildwheel@v2.19.2...v2.21.1)

---
updated-dependencies:
- dependency-name: pypa/cibuildwheel
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github_actions
...

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

.github/workflows/wheels.yml

@@ -30,7 +30,7 @@ jobs:
         with:
           components: llvm-tools-preview
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.19.2
+        uses: pypa/cibuildwheel@v2.21.1
         env:
           CIBW_BEFORE_BUILD: 'bash ./tools/build_pgo.sh /tmp/pgo-data/merged.profdata'
           CIBW_BEFORE_BUILD_WINDOWS: 'bash ./tools/build_pgo.sh /tmp/pgo-data/merged.profdata && cp /tmp/pgo-data/merged.profdata ~/.'
@@ -58,7 +58,7 @@ jobs:
         with:
           components: llvm-tools-preview
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.19.2
+        uses: pypa/cibuildwheel@v2.21.1
         env:
           CIBW_SKIP: 'pp* cp36-* cp37-* cp38-* *musllinux* *amd64 *x86_64'
       - uses: actions/upload-artifact@v4
@@ -104,7 +104,7 @@ jobs:
         with:
           platforms: all
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.19.2
+        uses: pypa/cibuildwheel@v2.21.1
         env:
           CIBW_ARCHS_LINUX: s390x
           CIBW_TEST_SKIP: "cp*"
@@ -138,7 +138,7 @@ jobs:
         with:
           platforms: all
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.19.2
+        uses: pypa/cibuildwheel@v2.21.1
         env:
           CIBW_ARCHS_LINUX: ppc64le
           CIBW_TEST_SKIP: "cp*"
@@ -172,7 +172,7 @@ jobs:
         with:
           platforms: all
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.19.2
+        uses: pypa/cibuildwheel@v2.21.1
         env:
           CIBW_ARCHS_LINUX: aarch64
       - uses: actions/upload-artifact@v4