build(deps): bump github.com/stretchr/testify from 1.8.0 to 1.8.1

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.8.0 to 1.8.1.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.8.0...v1.8.1)

go.mod

@@ -5,7 +5,7 @@ go 1.19
 require (
 	github.com/alecthomas/kong v0.6.1
 	github.com/apex/log v1.9.0
-	github.com/stretchr/testify v1.8.0
+	github.com/stretchr/testify v1.8.1
 	gitlab.com/unboundsoftware/apex-mocks v0.2.0
 	k8s.io/api v0.25.3
 	k8s.io/apimachinery v0.25.3