chore(deps): update mozilla-actions/sccache-action action to v0.0.8

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
mozilla-actions/sccache-action	action	patch	v0.0.7 -> v0.0.8

---

Release Notes

mozilla-actions/sccache-action (mozilla-actions/sccache-action)

v0.0.8

Compare Source

---

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.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

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

---

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

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/misc/usage_vs_getopt (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/timeout/timeout (passes in this run but fails in the 'main' branch)