chore(deps): bump postgresql from 16.7.27 to 18.11.0 in /charts/trueforge in the helm group across 1 directory

[dependabot]

⚠️ Dependabot is rebasing this PR ⚠️

Rebasing might not happen immediately, so don't worry if this takes some time.

Note: if you make any changes to this PR yourself, they will take precedence over the rebase.

---

Bumps the helm group with 1 update in the /charts/trueforge directory: postgresql.

Updates postgresql from 16.7.27 to 18.11.0

---

Note

Medium Risk
Major-version PostgreSQL subchart bump affects bundled database deployments; validate upgrades and Bitnami 18.x breaking changes even though values.yaml is unchanged here.

Overview
Updates the bundled Bitnami PostgreSQL Helm dependency for charts/trueforge from 16.7.27 to 18.11.0, and refreshes Chart.lock (version pin, digest, and generated timestamp). Redis stays at 24.0.0; no other chart files change in this diff.

When postgresql.enabled is true, installs/upgrades will resolve the newer subchart from the same OCI repo (oci://registry-1.docker.io/bitnamicharts).

^{Reviewed by Cursor Bugbot for commit 64653ce. Bugbot is set up for automated code reviews on this repo. Configure here.}

[changeset-bot]

⚠️ No Changeset found

Latest commit: 64653ce

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR