chore(deps): update stefanzweifel/git-auto-commit-action action to v6 (#1629)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[stefanzweifel/git-auto-commit-action](https://redirect.github.com/stefanzweifel/git-auto-commit-action)
| action | major | `v5` -> `v6` |

---

### Release Notes

<details>
<summary>stefanzweifel/git-auto-commit-action
(stefanzweifel/git-auto-commit-action)</summary>

###
[`v6`](https://redirect.github.com/stefanzweifel/git-auto-commit-action/blob/HEAD/CHANGELOG.md#v600---2025-06-10)

[Compare
Source](https://redirect.github.com/stefanzweifel/git-auto-commit-action/compare/v5...v6)

##### Added

- Throw error early if repository is in a detached state
([#&#8203;357](https://redirect.github.com/stefanzweifel/git-auto-commit-action/pull/357))

##### Fixed

- Fix PAT instructions with Dependabot
([#&#8203;376](https://redirect.github.com/stefanzweifel/git-auto-commit-action/pull/376))
[@&#8203;Dreamsorcerer](https://redirect.github.com/@&#8203;Dreamsorcerer)

##### Removed

- Remove support for `create_branch`, `skip_checkout`, `skip_Fetch`
([#&#8203;314](https://redirect.github.com/stefanzweifel/git-auto-commit-action/pull/314))

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "every weekday" (UTC), 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.

---

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

---

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.github/workflows/publish-theme.yaml

@@ -98,7 +98,7 @@ jobs:
                     npm show $PACKAGE_NAME@$PACKAGE_VER # fails if the package is not available, succeeds if it is
 
             -   name: Commit the new theme version
-                uses: stefanzweifel/git-auto-commit-action@v5
+                uses: stefanzweifel/git-auto-commit-action@v6
                 with:
                     commit_message: 'chore: publish new version of @apify/docs-theme [skip ci]'
                     file_pattern: 'apify-docs-theme/package*.json'