Merge pull request #1135 from dotnet/dependabot/nuget/Rx.NET/Source/ApprovalTests-4.5.0

Rx.NET/Source/tests/Tests.System.Reactive.ApiApprovals/Tests.System.Reactive.ApiApprovals.csproj

@@ -31,7 +31,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
-    <PackageReference Include="ApprovalTests" Version="4.4.0" />
+    <PackageReference Include="ApprovalTests" Version="4.5.0" />
     <PackageReference Include="DiffPlex" Version="1.5.0" />
     <PackageReference Include="PublicApiGenerator" Version="10.0.0" />
   </ItemGroup>