Bump ServiceStack from 3.9.71 to 5.9.2 in /Terradue.Tep

Bumps [ServiceStack](https://github.com/ServiceStack/ServiceStack) from 3.9.71 to 5.9.2.
- [Release notes](https://github.com/ServiceStack/ServiceStack/releases)
- [Commits](https://github.com/ServiceStack/ServiceStack/commits/v5.9.2)

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

Author: dependabot[bot]

Terradue.Tep/Terradue.Tep.csproj

@@ -32,7 +32,7 @@
     <Reference Include="Novell.Directory.Ldap"/>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="ServiceStack" Version="3.9.71"/>
+    <PackageReference Include="ServiceStack" Version="5.9.2"/>
     <PackageReference Include="ServiceStack.Common" Version="3.9.71"/>
     <PackageReference Include="ServiceStack.Text" Version="3.9.71"/>
     <PackageReference Include="ServiceStack.OrmLite.SqlServer" Version="3.9.71"/>