[cisco.nexus]: Pipeline Failing after daylight saving for BST timezone id

### Integration Name

Cisco Nexus [cisco_nexus]

### Dataset Name

cisco_nexus.log

### Integration Version

1.6.0

### Agent Version

syslog agent

### Agent Output Type

logstash

### Elasticsearch Version

8.19.11

### OS Version and Architecture

Cisco Nexus 9000 NX‑OS 10.5.x

### Software/API Version

na

### Error Message

"error": {
"message": [
"Processor date with tag date_set_timestamp_with_timezone in pipeline logs-cisco_nexus.log-1.6.0 failed with message: Unknown time-zone ID: BST"
]
}

### Event Original

anonymized log "<187>SW9301EDTOR01: 2026 Apr 1 22:16:25 BST: %AUTHPRIV-3-SYSTEM_MSG: pam_aaa: Authentication failed for user svc_discovery01 from 203.0.113.60 - dcos_sshd[31245]"

### What did you do?

data flow : source -> syslog agent -> logstash -> kafka-> logstash -> elastic

### What did you see?

error message for timezone BST

### What did you expect to see?

would like to see a workaround or a fix for the pipeline error

### Anything else?

_No response_