Bump github.com/stretchr/testify in /instrumentation/gin-gonic/gin (#75)
Bump github.com/stretchr/testify in /instrumentation/gin-gonic/gin (#75)

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.4.0 to 1.6.1.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.4.0...v1.6.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
Co-authored-by: ET <13bbaf930bf1d775097766b679d8121a38a43ad4@users.noreply.github.com>
Co-authored-by: Tyler Yahn <effea06561be35a324ea44b3b8c8ea7c825a61e7@gmail.com>
open-telemetry/opentelemetry-go-contrib,open-telemetry/opentelemetry-go-contrib,open-telemetry/opentelemetry-go-contrib