Fix code scanning alert - Use of a broken or weak cryptographic hashing algorithm on sensitive data

[taurus-forever]

Tracking issue for:

• [ ] https://github.com/canonical/pgbouncer-k8s-operator/security/code-scanning/1

[syncronize-issues-to-jira[bot]]

Thank you for reporting us your feedback!

The internal ticket has been created: https://warthogs.atlassian.net/browse/DPE-5336.

This message was autogenerated

[taurus-forever]

WIP in https://github.com/canonical/pgbouncer-k8s-operator/pull/313