chore(deps): update actions/checkout action to v2.7.0 (#459)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://togithub.com/actions/checkout) | action |
minor | `v2.4.0` -> `v2.7.0` |

---

### Release Notes

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

###
[`v2.7.0`](https://togithub.com/actions/checkout/releases/tag/v2.7.0)

[Compare
Source](https://togithub.com/actions/checkout/compare/v2.6.0...v2.7.0)

##### What's Changed

- Add new public key for known_hosts
([#&#8203;1237](https://togithub.com/actions/checkout/issues/1237)) by
[@&#8203;TingluoHuang](https://togithub.com/TingluoHuang) in
[actions/checkout#1238

**Full Changelog**:
actions/checkout@v2.6.0...v2.7.0

###
[`v2.6.0`](https://togithub.com/actions/checkout/releases/tag/v2.6.0)

[Compare
Source](https://togithub.com/actions/checkout/compare/v2.5.0...v2.6.0)

#### What's Changed

- Add backports to v2 branch by
[@&#8203;cory-miller](https://togithub.com/cory-miller) in
[actions/checkout#1040
- Includes backports from the following changes:
[actions/checkout#964,
[actions/checkout#1002,
[actions/checkout#1029
    -   Upgraded the licensed version to match what is used in v3.

**Full Changelog**:
actions/checkout@v2.5.0...v2.6.0

###
[`v2.5.0`](https://togithub.com/actions/checkout/releases/tag/v2.5.0)

[Compare
Source](https://togithub.com/actions/checkout/compare/v2.4.2...v2.5.0)

##### What's Changed

- Update [@&#8203;actions/core](https://togithub.com/actions/core) to
1.10.0 by [@&#8203;rentziass](https://togithub.com/rentziass) in
[actions/checkout#962

**Full Changelog**:
actions/checkout@v2...v2.5.0

###
[`v2.4.2`](https://togithub.com/actions/checkout/releases/tag/v2.4.2)

[Compare
Source](https://togithub.com/actions/checkout/compare/v2.4.1...v2.4.2)

##### What's Changed

- Add set-safe-directory input to allow customers to take control.
([#&#8203;770](https://togithub.com/actions/checkout/issues/770)) by
[@&#8203;TingluoHuang](https://togithub.com/TingluoHuang) in
[actions/checkout#776
- Prepare changelog for v2.4.2. by
[@&#8203;TingluoHuang](https://togithub.com/TingluoHuang) in
[actions/checkout#778

**Full Changelog**:
actions/checkout@v2...v2.4.2

###
[`v2.4.1`](https://togithub.com/actions/checkout/releases/tag/v2.4.1)

[Compare
Source](https://togithub.com/actions/checkout/compare/v2.4.0...v2.4.1)

- Fixed an issue where checkout failed to run in container jobs due to
the new git setting `safe.directory`

</details>

---

### Configuration

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

🚦 **Automerge**: Enabled.

♻ **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
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---

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---

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.github/workflows/sync-to-azure.yml

@@ -24,7 +24,7 @@ jobs:
     if: needs.check-env.outputs.azure-key == 'true'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v2.7.0
 
       - name: Extract branch name
         shell: bash