Fix building the manylinux wheels

Use the `manylinux2014` image when building the manylinux wheels

The default imaged change from `manylinux2014` to `manylinux_2_28` in cibuildwheel 3.0.0: pypa/cibuildwheel#2330

This is required or it will fail during the auditwheel repair step

Author: Lauszus

.github/workflows/manylinux_wheels.yml

@@ -37,6 +37,8 @@ jobs:
     env:
       CIBW_ENVIRONMENT_LINUX: "KIVY_SPLIT_EXAMPLES=1 USE_X11=1 USE_SDL3=1 USE_PANGOFT2=0 USE_GSTREAMER=0 KIVY_DEPS_ROOT=$(pwd)/kivy-dependencies LD_LIBRARY_PATH=$(pwd)/kivy-dependencies/dist/lib:$(pwd)/kivy-dependencies/dist/lib64"
       CIBW_BUILD_VERBOSITY_LINUX: 3
+      CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
+      CIBW_MANYLINUX_AARCH64_IMAGE: manylinux2014
       CIBW_BUILD:  ${{ matrix.cibw_build }}
       CIBW_ARCHS: ${{ matrix.cibw_archs }}
       CIBW_BEFORE_ALL_LINUX: >