chore: pin dependencies

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/dadrus/heimdall		pinDigest	-> f5a92d6
slsa-framework/slsa-github-generator	action	pinDigest	-> f7dd8c5

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

👻 Immortal: This PR will be recreated if closed unmerged. Get config help if that's undesired.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[dadrus]

will never merge it