fix getting started link (#802)

Author: blotus

crowdsec-docs/docs/intro.mdx

@@ -60,7 +60,7 @@ Under the hood, the Security Engine has various components:
 
 This architecture allows for both simple/standalone setups, or more distributed ones including as illustrated below:
 
--   Single machine ? Follow our [getting started guide](/getting_started/install_crowdsec)
+-   Single machine ? Follow our [getting started guide](/u/getting_started/intro)
 -   Multiple machines? Use the [distributed setup guide](/u/user_guides/multiserver_setup)
 -   Already have a log pit (such as rsyslog or loki)? [Run crowdsec next to it](/u/user_guides/log_centralization), not on the production workloads
 -   Running Kubernetes? Have a look at [our helm chart](/u/getting_started/installation/kubernetes)