Update testcontainers to 3.4.0

OhmGraphite.Test/OhmGraphite.Test.csproj

@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
-    <PackageReference Include="Testcontainers" Version="3.3.0" />
+    <PackageReference Include="Testcontainers" Version="3.4.0" />
     <PackageReference Include="xunit" Version="2.5.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.0" />
     <PackageReference Include="xunit.runner.console" Version="2.5.0" />