update testcontainers to 4.5.0 (#152)

Author: renovate[bot]

tests/Prometheus.Client.MetricPusher.Tests.csproj

@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="NSubstitute" Version="5.3.0" />
-    <PackageReference Include="Testcontainers" Version="4.4.0" />
+    <PackageReference Include="Testcontainers" Version="4.5.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.*">
       <PrivateAssets>all</PrivateAssets>