chore(deps): update actions/checkout action to v3 (#333)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://togithub.com/actions/checkout) | action |
major | `v2` -> `v3` |

---

### Release Notes

<details>
<summary>actions/checkout</summary>

###
[`v3`](https://togithub.com/actions/checkout/blob/HEAD/CHANGELOG.md#v302)

[Compare Source](https://togithub.com/actions/checkout/compare/v2...v3)

- [Add input
`set-safe-directory`](https://togithub.com/actions/checkout/pull/770)

</details>

---

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Automerge - At any time (no schedule defined).

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

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rebase/retry checkbox.

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

---

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.github/workflows/fossa.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Download fossa cli
         run: |-
           mkdir -p $HOME/.local/bin

.github/workflows/pre-release.yml

@@ -8,7 +8,7 @@ jobs:
   prerelease:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-node@v2
         with:
           node-version: '*'

.github/workflows/release-please.yml

@@ -19,7 +19,7 @@ jobs:
           release-type: node
           package-name: '@netlify/functions'
           bump-minor-pre-major: true
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         if: ${{ steps.release.outputs.release_created }}
       - uses: actions/setup-node@v2
         with:

.github/workflows/workflow.yml

@@ -22,7 +22,7 @@ jobs:
       fail-fast: false
     steps:
       - name: Git checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v2
         with: