Chore(deps): Bump github.com/gruntwork-io/terratest (#811)

Bumps [github.com/gruntwork-io/terratest](https://github.com/gruntwork-io/terratest) from 0.40.19 to 0.40.20.
- [Release notes](https://github.com/gruntwork-io/terratest/releases)
- [Commits](gruntwork-io/terratest@v0.40.19...v0.40.20)

---
updated-dependencies:
- dependency-name: github.com/gruntwork-io/terratest
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

go.mod

@@ -4,7 +4,7 @@ go 1.17
 
 require (
 	github.com/go-test/deep v1.0.8
-	github.com/gruntwork-io/terratest v0.40.19
+	github.com/gruntwork-io/terratest v0.40.20
 	github.com/hashicorp/terraform-plugin-sdk/v2 v2.20.0
 	github.com/hashicorp/terraform-provider-google v1.20.1-0.20210625223728-379bcb41c06b
 	github.com/mongodb-forks/digest v1.0.4