[conv-ttl-rs485-gw] broken links
in https://ohwr.org/project/conv-ttl-rs485-gw,
- wrong/broken link D-Sub9RTM, it should be D-Sub9RTM
- wrong/broken link CONV-TTL-RS485-RTM-DB9, it should be CONV-TTL-RS485-RTM-DB9
in https://ohwr.org/project/conv-ttl-rs485-gw,