Backport of update user pass dummy string into release/1.20.x

[hc-github-team-secure-vault-core]

Backport

This PR is auto-generated from #31342 to be assessed for backporting due to the inclusion of the label backport/1.20.x.

The below text is copied from the body of the original PR.

---

Description

follow up to #31318 which did not have the intended effect

TODO only if you're a HashiCorp employee

• Backport Labels: If this fix needs to be backported, use the appropriate backport/ label that matches the desired release branch. Note that in the CE repo, the latest release branch will look like backport/x.x.x, but older release branches will be backport/ent/x.x.x+ent.
  • LTS: If this fixes a critical security vulnerability or severity 1 bug, it will also need to be backported to the current LTS versions of Vault. To ensure this, use all available enterprise labels.

PCI review checklist

• I have documented a clear reason for, and description of, the change I am making.

---

Overview of commits

• 1d60673

[github-actions]

CI Results:
All Go tests succeeded! ✅

[github-actions]

Build Results:
All builds succeeded! ✅