chore: update build workflow to skip specific Python versions

Author: mliezun

.github/workflows/build-and-cache-libpq.yml

@@ -94,9 +94,8 @@ jobs:
 
       - name: Build wheels
         uses: pypa/[email protected]
-        with:
-          package-dir: psycopg_c
         env:
+          CIBW_SKIP: "cp31?t-*"
           CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
           CIBW_MANYLINUX_I686_IMAGE: manylinux2014
           CIBW_MANYLINUX_AARCH64_IMAGE: manylinux_2_28