fix(docs): update rules setup documentation

Signed-off-by: Luca Guerra <[email protected]>

content/en/docs/reference/rules/default-rules/index.md

@@ -15,15 +15,15 @@ By default, only the `stable` rules are loaded by Falco, you can install the `sa
 
 ```shell
 helm install falco falcosecurity/falco \
---set "falcoctl.config.artifact.install.refs={falco-rules:2,falco-incubating-rules:2,falco-sandbox-rules:2}" \
---set "falcoctl.config.artifact.follow.refs={falco-rules:2,falco-incubating-rules:2,falco-sandbox-rules:2}" \
---set "falco.rules_file={/etc/falco/k8s_audit_rules.yaml,/etc/falco/rules.d,/etc/falco/falco_rules.yaml,/etc/falco/falco-incubating_rules.yaml,/etc/falco/falco-sandbox_rules.yaml}"
+--set "falcoctl.config.artifact.install.refs={falco-rules:3,falco-incubating-rules:4,falco-sandbox-rules:4}" \
+--set "falcoctl.config.artifact.follow.refs={falco-rules:3,falco-incubating-rules:4,falco-sandbox-rules:4}" \
+--set "falco.rules_files={/etc/falco/k8s_audit_rules.yaml,/etc/falco/rules.d,/etc/falco/falco_rules.yaml,/etc/falco/falco-incubating_rules.yaml,/etc/falco/falco-sandbox_rules.yaml}"
 ```
 
-Where the option `falcoctl.config.artifact.install.refs` governs which rules are downloaded at startup, `falcoctl.config.artifact.follow.refs` identifies which rules are automatically updated and `falco.rules_file` indicates which rules are loaded by the engine.
+Where the option `falcoctl.config.artifact.install.refs` governs which rules are downloaded at startup, `falcoctl.config.artifact.follow.refs` identifies which rules are automatically updated and `falco.rules_files` indicates which rules are loaded by the engine.
 
 {{% /pageinfo %}}
 
 You can find all the rules in their official [repository](https://github.com/falcosecurity/rules/blob/main/rules/).
 
-{{< rules_list >}}
+{{< rules_list >}}