Generator: Update SDK /services/* changelogs

[Benjosh95]

Description

Included updated changelogs:

• redis
• stackitmarketplace
• sqlserverflex
• rabbitmq
• postgresflex
• cdn
• auditlog
• iaas
• dns

Checklist

• Issue was linked above
• No generated code was adjusted manually (check comments in file header)
• Changelogs
  • Changelog in the root directory was adjusted (see here)
  • Changelog(s) of the service(s) were adjusted (see e.g. here)
• Code format was applied: make fmt
• Examples were added / adjusted (see examples/ directory)
• Unit tests got implemented or updated
• Unit tests are passing: make test (will be checked by CI)
• No linter issues: make lint (will be checked by CI)