fix other bash for consistency

Author: micheleRP

modules/manage/pages/security/fips-compliance.adoc

@@ -44,7 +44,7 @@ Redpanda logs an error and exits immediately if:
 
 To place a broker in FIPS compliance mode, enable xref:reference:properties/broker-properties.adoc#fips_mode[`fips_mode`] in the Redpanda broker configuration file (typically located in `/etc/redpanda/redpanda.yaml`). All fields are within the `redpanda` object:
 
-```bash
+```yaml
 redpanda:
   # ....
   fips_mode: enabled