Bump actions/checkout from 2 to 3 (#84)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...v3)

---
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>
diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index dafb2d1..a1ae6ef 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -10,7 +10,7 @@
       - uses: actions/setup-go@v2
         with:
           go-version: 1.13.x
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Build
         run: go build .
       - name: Test