[CI] Publish truefoundry to version 0.138.2

[innoavator]

Automated changes by create-pull-request GitHub action

---

Note

Low Risk
Primarily version bumps in Helm metadata and default image tags; risk is limited to deploying new component images with potential behavior changes outside this repo.

Overview
Updates the truefoundry Helm chart release from 0.138.1 to 0.138.2, including the regenerated Chart.lock metadata.

Bumps default version pins in values.yaml/README.md, notably global.controlPlaneChartVersion to 0.138.2, servicefoundryServer.image.tag to v0.138.2, and tfyProxy.image.tag to v0.138.1.

^{Reviewed by Cursor Bugbot for commit a47f5b8. Bugbot is set up for automated code reviews on this repo. Configure here.}