Bump Microsoft.NET.Test.Sdk from 17.6.2 to 17.6.3 (#84)

Author: dependabot[bot]

RegexToolbox.Tests/RegexToolbox.Tests.csproj

@@ -11,7 +11,7 @@
     <ItemGroup>
         <PackageReference Include="nunit" Version="3.13.3" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.2" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
     </ItemGroup>
 
     <ItemGroup>