Also build manylinux wheels for aarch64

Author: nabla-c0d3

.github/workflows/build_wheels.yml

@@ -33,6 +33,7 @@ jobs:
           # Build manylinux2014 wheels
           CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
           CIBW_MANYLINUX_I686_IMAGE: manylinux2014
+          CIBW_MANYLINUX_AARCH64_IMAGE: manylinux2014
           # The C libraries (OpenSSL and Zlib) only need to be built once per OS
           # as they are not tied to a specific Python version
           CIBW_BEFORE_ALL: "python -m pip install invoke && invoke build.deps"