CI: Update to cibuildwheel 2.20.0 (pandas-dev#59401)

cibuildwheel 2.20.0 uses the ABI stable Python 3.13.0rc1 and build Python 3.13 wheels by default, which allows removing the `CIBW_PRERELEASE_PYTHONS` flag.

Co-authored-by: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
(cherry picked from commit 70bb855)

.circleci/config.yml

@@ -72,7 +72,7 @@ jobs:
           name: Build aarch64 wheels
           no_output_timeout: 30m # Sometimes the tests won't generate any output, make sure the job doesn't get killed by that
           command: |
-            pip3 install cibuildwheel==2.15.0
+            pip3 install cibuildwheel==2.20.0
             cibuildwheel --prerelease-pythons --output-dir wheelhouse
 
           environment:

.github/workflows/wheels.yml

@@ -156,7 +156,6 @@ jobs:
         with:
          package-dir: ./dist/${{ startsWith(matrix.buildplat[1], 'macosx') && env.sdist_name || needs.build_sdist.outputs.sdist_file }}
         env:
-          CIBW_PRERELEASE_PYTHONS: True
           CIBW_BUILD: ${{ matrix.python[0] }}-${{ matrix.buildplat[1] }}
           CIBW_BUILD_FRONTEND: ${{ matrix.cibw_build_frontend || 'pip' }}