Bump NUnit3TestAdapter from 3.9.0 to 3.11.2 (#411)

Bumps [NUnit3TestAdapter](https://github.com/nunit/nunit3-vs-adapter) from 3.9.0 to 3.11.2.
- [Release notes](https://github.com/nunit/nunit3-vs-adapter/releases)
- [Commits](https://github.com/nunit/nunit3-vs-adapter/commits/3.11.2

)

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