Package Dependencies: Bump the testcontainers group with 2 updates (#48)

Bumps the testcontainers group with 2 updates: [Testcontainers](https://github.com/testcontainers/testcontainers-dotnet) and [Testcontainers.PostgreSql](https://github.com/testcontainers/testcontainers-dotnet).


Updates `Testcontainers` from 3.7.0 to 3.9.0
- [Release notes](https://github.com/testcontainers/testcontainers-dotnet/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-dotnet/blob/develop/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-dotnet@3.7.0...3.9.0)

Updates `Testcontainers.PostgreSql` from 3.7.0 to 3.9.0
- [Release notes](https://github.com/testcontainers/testcontainers-dotnet/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-dotnet/blob/develop/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-dotnet@3.7.0...3.9.0)

Updates `Testcontainers` from 3.7.0 to 3.9.0
- [Release notes](https://github.com/testcontainers/testcontainers-dotnet/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-dotnet/blob/develop/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-dotnet@3.7.0...3.9.0)

---
updated-dependencies:
- dependency-name: Testcontainers
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: testcontainers
- dependency-name: Testcontainers.PostgreSql
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: testcontainers
- dependency-name: Testcontainers
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: testcontainers
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

QueryKit.IntegrationTests/QueryKit.IntegrationTests.csproj

@@ -17,8 +17,8 @@
         <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.1" />
         <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="8.0.1" />
         <PackageReference Include="CleanMoq" Version="1.0.0" />
-        <PackageReference Include="Testcontainers" Version="3.7.0" />
-        <PackageReference Include="Testcontainers.PostgreSql" Version="3.7.0" />
+        <PackageReference Include="Testcontainers" Version="3.9.0" />
+        <PackageReference Include="Testcontainers.PostgreSql" Version="3.9.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
         <PackageReference Include="xunit" Version="2.6.6" />
         <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6">