Bump github.com/stretchr/testify from 1.7.0 to 1.7.1 in /cmd/mdatagen

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.7.0 to 1.7.1.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.7.0...v1.7.1)

---
updated-dependencies:
- dependency-name: github.com/stretchr/testify
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

cmd/mdatagen/go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/go-playground/locales v0.14.0
 	github.com/go-playground/universal-translator v0.18.0
 	github.com/go-playground/validator/v10 v10.11.0
-	github.com/stretchr/testify v1.7.2
+	github.com/stretchr/testify v1.7.5
 	go.opentelemetry.io/collector v0.53.0
 	go.opentelemetry.io/collector/pdata v0.53.0
 )