fix(content): section header

Signed-off-by: Leonardo Grasso <me@leonardograsso.com>

content/en/docs/concepts/event-sources/_index.md

@@ -54,6 +54,7 @@ This example enables only the `syscall` and `k8s_audit` sources. The `syscall` s
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 The `k8s_audit` source is also available through different plugins: `k8saudit`, `k8saudit-aks`, `k8saudit-eks`, `k8saudit-gke` and `k8suadit-ovh`, choose the one fitting your environment. They all share the same set of rules.
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 ### Using `--disable-source`
 
 Disables specific event sources while keeping others active. This is useful if you want to prevent Falco from consuming events from certain sources.