Bump Testcontainers.PostgreSql from 4.8.0 to 4.8.1 (#980)

Updated
[Testcontainers.PostgreSql](https://github.com/testcontainers/testcontainers-dotnet)
from 4.8.0 to 4.8.1.

<details>
<summary>Release notes</summary>

_Sourced from [Testcontainers.PostgreSql's
releases](https://github.com/testcontainers/testcontainers-dotnet/releases)._

## 4.8.1

# What's Changed

## 🐛 Bug Fixes

* fix: Compute correct relative Dockerfile file path (#​1558)
@​HofmeisterAn


Commits viewable in [compare
view](testcontainers/testcontainers-dotnet@4.8.0...4.8.1).
</details>

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</details>

Author: jvyden

RefreshTests.GameServer/RefreshTests.GameServer.csproj

@@ -24,7 +24,7 @@
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Testcontainers.PostgreSql" Version="4.8.0" />
+        <PackageReference Include="Testcontainers.PostgreSql" Version="4.8.1" />
     </ItemGroup>
 
     <ItemGroup>