Bump NUnit3TestAdapter from 3.15.0 to 3.15.1

Bumps [NUnit3TestAdapter](https://github.com/nunit/nunit3-vs-adapter) from 3.15.0 to 3.15.1.
- [Release notes](https://github.com/nunit/nunit3-vs-adapter/releases)
- [Commits](nunit/nunit3-vs-adapter@V3.15...V3.15.1)

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

Author: dependabot-preview[bot]

src/Directory.Build.props

@@ -23,7 +23,7 @@
     <PackageVersion_NSubstitute>4.2.1</PackageVersion_NSubstitute>
     <PackageVersion_CoverletMsBuild>2.6.3</PackageVersion_CoverletMsBuild>
     <PackageVersion_NUnit>3.12.0</PackageVersion_NUnit>
-    <PackageVersion_NUnit3TestAdapter>3.15.0</PackageVersion_NUnit3TestAdapter>
+    <PackageVersion_NUnit3TestAdapter>3.15.1</PackageVersion_NUnit3TestAdapter>
     <PackageVersion_NunitXmlTestLogger>2.1.41</PackageVersion_NunitXmlTestLogger>
     <PackageVersion_Shouldly>4.0.0-beta0002</PackageVersion_Shouldly>