chore(deps): bump github.com/go-openapi/testify/v2

Bumps the go-openapi-dependencies group with 1 update: [github.com/go-openapi/testify/v2](https://github.com/go-openapi/testify).


Updates `github.com/go-openapi/testify/v2` from 2.5.1 to 2.6.0
- [Release notes](https://github.com/go-openapi/testify/releases)
- [Commits](go-openapi/testify@v2.5.1...v2.6.0)

---
updated-dependencies:
- dependency-name: github.com/go-openapi/testify/v2
  dependency-version: 2.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: go-openapi-dependencies
...

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

Author: dependabot[bot]

go.mod

@@ -1,5 +1,5 @@
 module github.com/go-openapi/errors
 
-require github.com/go-openapi/testify/v2 v2.5.1
+require github.com/go-openapi/testify/v2 v2.6.0
 
 go 1.25.0

go.sum

@@ -1,2 +1,2 @@
-github.com/go-openapi/testify/v2 v2.5.1 h1:TMdhCaw8fUNraVSf3Omoob1dO/AzBfhtFAPW0an6sBo=
-github.com/go-openapi/testify/v2 v2.5.1/go.mod h1:SgsVHtfooshd0tublTtJ50FPKhujf47YRqauXXOUxfw=
+github.com/go-openapi/testify/v2 v2.6.0 h1:5PKH2HE7YJ/LuRPQGvSxBRlFXNQhSetBLlGAgUEu3ug=
+github.com/go-openapi/testify/v2 v2.6.0/go.mod h1:SgsVHtfooshd0tublTtJ50FPKhujf47YRqauXXOUxfw=