chore: try pinning rustc version to the last known working one

Author: barjin

.github/workflows/python-test.yaml

@@ -91,6 +91,7 @@ jobs:
                 # NOTE: rust-cross/manylinux docker images are CentOS based
                 yum update -y
                 yum install -y openssl openssl-devel perl perl-IPC-Cmd
+                rustup default 1.93.0
                 ;;
             esac