Update debian/ola-rdm-tests.rdm_test_server.service

Co-authored-by: Peter Newman <peternewman@users.noreply.github.com>

Author: DaAwesomeP

debian/ola-rdm-tests.rdm_test_server.service

@@ -1,6 +1,6 @@
 [Unit]
 Description=Open Lighting Architecture RDM Test Server
-Documentation=man:olad(1)
+Documentation=man:rdm_test_server.py(1)
 After=network.target remote-fs.target olad.service
 Wants=olad.service