The demo schema-registry fails on my M1 Mac

[neverchanje]

      In file included from /tmp/pip-install-hwvkf8uv/confluent-kafka_83551e1b6bfc4a57b1e41234535e1840/src/confluent_kafka/src/Admin.c:17:
      /tmp/pip-install-hwvkf8uv/confluent-kafka_83551e1b6bfc4a57b1e41234535e1840/src/confluent_kafka/src/confluent_kafka.h:23:10: fatal error: librdkafka/rdkafka.h: No such file or directory
         23 | #include <librdkafka/rdkafka.h>
            |          ^~~~~~~~~~~~~~~~~~~~~~
      compilation terminated.
      error: command '/usr/bin/gcc' failed with exit code 1
      [end of output]

Somehow rdkafka.h was not correctly installed and the file was not found by confluent_kafka.