Explicitly specify manylinux2014 in wheel building config (#184)

Author: ngoldbaum

.github/workflows/ci.yaml

@@ -174,11 +174,11 @@ jobs:
           cd .. && \
           rm -rf libffi-3.4.6
         CIBW_ENVIRONMENT_PASS_LINUX: CFLAGS  # ensure that the build container can see our overridden build config
-        CIBW_MANYLINUX_X86_64_IMAGE: ${{ matrix.manylinux_img || '' }}
-        CIBW_MANYLINUX_I686_IMAGE: ${{ matrix.manylinux_img || '' }}
-        CIBW_MANYLINUX_AARCH64_IMAGE: ${{ matrix.manylinux_img || '' }}
-        CIBW_MANYLINUX_PPC64LE_IMAGE: ${{ matrix.manylinux_img || '' }}
-        CIBW_MANYLINUX_S390X_IMAGE: ${{ matrix.manylinux_img || '' }}
+        CIBW_MANYLINUX_X86_64_IMAGE: ${{ matrix.manylinux_img || 'manylinux2014' }}
+        CIBW_MANYLINUX_I686_IMAGE: ${{ matrix.manylinux_img || 'manylinux2014' }}
+        CIBW_MANYLINUX_AARCH64_IMAGE: ${{ matrix.manylinux_img || 'manylinux2014' }}
+        CIBW_MANYLINUX_PPC64LE_IMAGE: ${{ matrix.manylinux_img || 'manyinux2014' }}
+        CIBW_MANYLINUX_S390X_IMAGE: ${{ matrix.manylinux_img || 'manylinux2014' }}
         CIBW_MUSLLINUX_X86_64_IMAGE: ${{ matrix.musllinux_img || 'musllinux_1_2' }}
         CIBW_MUSLLINUX_I686_IMAGE: ${{ matrix.musllinux_img || 'musllinux_1_2' }}
         CIBW_MUSLLINUX_AARCH64_IMAGE: ${{ matrix.musllinux_img || 'musllinux_1_2' }}