Bump NUnit from 4.4.0 to 4.5.0 (#946)

---
updated-dependencies:
- dependency-name: NUnit
  dependency-version: 4.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: NUnit
  dependency-version: 4.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

tests/NSubstitute.Acceptance.Specs/NSubstitute.Acceptance.Specs.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.3" />
-    <PackageReference Include="NUnit" Version="4.4.0" />
+    <PackageReference Include="NUnit" Version="4.5.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
   </ItemGroup>
 

tests/NSubstitute.Documentation.Tests/NSubstitute.Documentation.Tests.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="NUnit" Version="4.4.0" />
+    <PackageReference Include="NUnit" Version="4.5.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
   </ItemGroup>