Bump Testcontainers from 4.8.1 to 4.9.0

---
updated-dependencies:
- dependency-name: Testcontainers
  dependency-version: 4.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn.Test/BackendConfiguration.Pn.Test.csproj

@@ -16,7 +16,7 @@
         <PrivateAssets>all</PrivateAssets>
       </PackageReference>
       <PackageReference Include="NUnit3TestAdapter" Version="5.2.0" />
-      <PackageReference Include="Testcontainers" Version="4.8.1" />
+      <PackageReference Include="Testcontainers" Version="4.9.0" />
       <PackageReference Include="Testcontainers.MariaDb" Version="4.8.1" />
     </ItemGroup>