CI: build with manylinux_2_28

since centos7 is EOL, and it's mirrors now broken
we are switching to newer manylinux version

Ref: pypa/cibuildwheel#1772

.github/workflows/build-push.yml

@@ -11,6 +11,12 @@ env:
  CIBW_BEFORE_BUILD_LINUX: "rm -rf ~/.pyxbld && yum install -y libffi-devel libev libev-devel openssl openssl-devel"
  CIBW_ENVIRONMENT: "CASS_DRIVER_BUILD_CONCURRENCY=2 CFLAGS='-g0 -O3'"
  CIBW_SKIP: cp35* cp36* *musllinux*
+ CIBW_MANYLINUX_X86_64_IMAGE: manylinux_2_28
+ CIBW_MANYLINUX_I686_IMAGE: manylinux_2_28
+ CIBW_MANYLINUX_PYPY_X86_64_IMAGE: manylinux_2_28
+ CIBW_MANYLINUX_AARCH64_IMAGE: manylinux_2_28
+ CIBW_MANYLINUX_PYPY_AARCH64_IMAGE: manylinux_2_28
+ CIBW_MANYLINUX_PYPY_I686_IMAGE: manylinux_2_28
 
 jobs:
   build_wheels: