Bump ServiceStack in /src/TechStacks/TechStacks.Tests

Bumps [ServiceStack](https://github.com/ServiceStack/ServiceStack) from 5.6.0 to 5.9.2.
- [Release notes](https://github.com/ServiceStack/ServiceStack/releases)
- [Commits](ServiceStack/ServiceStack@v5.6...v5.9.2)

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

Author: dependabot[bot]

src/TechStacks/TechStacks.Tests/TechStacks.Tests.csproj

@@ -76,7 +76,7 @@
   <ItemGroup>
     <PackageReference Include="Npgsql" Version="4.0.9" />
     <PackageReference Include="NUnit" Version="3.12.0" />
-    <PackageReference Include="ServiceStack" Version="5.6.0" />
+    <PackageReference Include="ServiceStack" Version="5.9.2" />
     <PackageReference Include="ServiceStack.Client" Version="5.6.0" />
     <PackageReference Include="ServiceStack.Common" Version="5.6.0" />
     <PackageReference Include="ServiceStack.Interfaces" Version="5.6.0" />