design/management-console: rename files from underscore to dash

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ia1c0b69981faa8ed9890b1c7c90a7c83e44b3985
diff --git a/designs/management-console/service_discovery.md b/designs/management-console/service-discovery.md
similarity index 100%
rename from designs/management-console/service_discovery.md
rename to designs/management-console/service-discovery.md