chore(deps): update chromaui/action action to v15.3.1 (#8371)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [chromaui/action](https://redirect.github.com/chromaui/action) |
action | patch | `v15.3.0` → `v15.3.1` |

---

### Release Notes

<details>
<summary>chromaui/action (chromaui/action)</summary>

###
[`v15.3.1`](https://redirect.github.com/chromaui/action/blob/HEAD/CHANGELOG.md#v1531-Mon-Mar-23-2026)

[Compare
Source](https://redirect.github.com/chromaui/action/compare/v15.3.0...v15.3.1)

##### 🐛 Bug Fix

- Properly timeout process tree in shell commands
[#&#8203;1254](https://redirect.github.com/chromaui/chromatic-cli/pull/1254)
([@&#8203;codykaup](https://redirect.github.com/codykaup))

##### Authors: 1

- Cody Kaup ([@&#8203;codykaup](https://redirect.github.com/codykaup))

***

</details>

---

### Configuration

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

🚦 **Automerge**: Enabled.

♻ **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 was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/UI5/webcomponents-react).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My42Ni40IiwidXBkYXRlZEluVmVyIjoiNDMuNjYuNCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiZGVwZW5kZW5jaWVzIl19-->

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

Author: renovate[bot]

.github/workflows/chromatic.yml

@@ -23,7 +23,7 @@ jobs:
         run: yarn install --immutable
 
       - name: Publish to Chromatic
-        uses: chromaui/action@0794e6939fe40ce46a88963f818092afc427da5b # v15.3.0
+        uses: chromaui/action@eea1606238fd97a70b5af723d103953d1f40967b # v15.3.1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           projectToken: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}