build(deps): bump actions/checkout from 2.4.0 to 3.0.0 (#922)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.0 to 3.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.4.0...v3.0.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/go.yml

@@ -23,7 +23,7 @@ jobs:
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v2.4.0
+      uses: actions/checkout@v3.0.0
 
     - name: Build
       env:

.github/workflows/nix.yml

@@ -8,7 +8,7 @@ jobs:
     name: Build
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3.0.0
         with:
           fetch-depth: 1
       - uses: cachix/install-nix-action@v17

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
         with:
           go-version: 1.16
       - name: Checkout code
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3.0.0
       - name: Get release notes
         id: release-notes
         run: |