chore(deps): update ruby/setup-ruby digest to 9669f3e (#306)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| ruby/setup-ruby | action | digest | `31a7f6d` -> `9669f3e` |

---

### Configuration

📅 **Schedule**: Branch creation - "before 3am on Monday" in timezone
America/New_York, Automerge - At any time (no schedule defined).

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

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

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

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://app.renovatebot.com/dashboard#github/openedx/edx-ui-toolkit).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNC4xNjAuMCIsInVwZGF0ZWRJblZlciI6IjM0LjE2MC4wIn0=-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Mashal Malik <107556986+Mashal-m@users.noreply.github.com>

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
         run: export DISPLAY=:99.0
 
       - name: Install Ruby
-        uses: ruby/setup-ruby@31a7f6d628878b80bc63375a93ae079ec50a1601
+        uses: ruby/setup-ruby@9669f3ee51dc3f4eda8447ab696b3ab19a90d14b
         with:
           ruby-version: 2.7.3