CI: github: remove ERR=1 temporarly from the ECH job

CI: github: remove ERR=1 temporarly from the ECH job

The ECH job still fails to compile since the openssl 4.0 deprecated
functions were not removed yet. Let's remove ERR=1 temporarly.

We do know that there's a regression in OpenSSL 4.0 with these
reg-tests though:

Error: #    top  TEST reg-tests/ssl/set_ssl_crlfile.vtc FAILED (0.219) exit=2
Error: #    top  TEST reg-tests/ssl/set_ssl_cafile.vtc FAILED (0.236) exit=2
Error: #    top  TEST reg-tests/quic/set_ssl_crlfile.vtc FAILED (0.196) exit=2