Update dependency Microsoft.NET.Test.Sdk to 18.3.0 (tests only)

skip-release-and-release-note: true
GitOrigin-RevId: 1a143f4119d4f6b69566eaa28a79a03105aa0ee4

Author: Octobob

source/Octopus.Client.E2ETests/Octopus.Client.E2ETests.csproj

@@ -22,7 +22,7 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
         <PackageReference Include="NSubstitute" Version="5.3.0" />
         <PackageReference Include="NUnit" Version="4.5.0" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" NoWarn="NU1701" /> <!-- This package only targets legacy .NET desktop, but it still works on netcore so we force past the warning -->

source/Octopus.Client.Tests/Octopus.Client.Tests.csproj

@@ -35,7 +35,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
     <PackageReference Include="NUnit" Version="4.5.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" NoWarn="NU1701" /> <!-- This package only targets legacy .NET desktop, but it still works on netcore so we force past the warning -->
     <PackageReference Include="TeamCity.VSTest.TestAdapter" Version="1.0.41" NoWarn="NU1701" /> <!-- This package only targets legacy .NET desktop, but it still works on netcore so we force past the warning -->