chore(deps): Update actions/checkout action to v6 (#875)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) | action | major | `v4` → `v6` |

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### Release Notes

<details>
<summary>actions/checkout (actions/checkout)</summary>

### [`v6`](https://redirect.github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v602)

[Compare Source](https://redirect.github.com/actions/checkout/compare/v5...v6)

- Fix tag handling: preserve annotations and explicit fetch-tags by [@&#8203;ericsciple](https://redirect.github.com/ericsciple) in [#&#8203;2356](https://redirect.github.com/actions/checkout/pull/2356)

### [`v5`](https://redirect.github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v501)

[Compare Source](https://redirect.github.com/actions/checkout/compare/v4...v5)

- Port v6 cleanup to v5 by [@&#8203;ericsciple](https://redirect.github.com/ericsciple) in [#&#8203;2301](https://redirect.github.com/actions/checkout/pull/2301)

</details>

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### Configuration

📅 **Schedule**: Branch creation - Between 12:00 AM and 03:59 AM, on day 1 of the month ( * 0-3 1 * * ) (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.

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

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Author: cloudquery-ci[bot]

README.md

@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # Checkout a git repository with a pre-existing CloudQuery configuration files
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       # Setup AWS credentials (example)
       - name: Configure AWS credentials