sysutils/logstash7: Update to 7.9.3

Changelog for 7.9.3:

• Notable issues fixed:
  • Pipeline execution fixes to flushing and shutdown:
    • Fix to stop inputs upon a worker error before terminating the pipeline
• Plugins:
  • File Input - 4.2.2
    • Fix: sincedb_clean_after not being respected
  • Snmp Input - 1.2.7
    • Added integration tests to ensure SNMP server and IPv6 connections
    • Docs: example on setting IPv6 hosts
  • Twitter Input - 4.0.3
    • Fix: broken proxy configuration
    • Fix: user rest api call + proxy configuration

PR: 250605
Submitted by: Juraj Lutter <juraj@lutter.sk>