DockerComposeEnvironment duplicates the image name

[davidfowl]

This is a regression from the last release to fix the fact that we no longer hard code "latest". This logic needs to upsert the existing image name instead

aspire/src/Aspire.Hosting.Docker/DockerComposePublishingContext.cs

Lines 190 to 196 in a0eb933

	if (source is ContainerImageReference cir && cir.Resource.TryGetContainerImageName(out var imageName))
	{
	defaultValue = imageName;
	onlyIfMissing = false; // Always update the image name if it changes
	}
	envFile.Add(key, defaultValue, description, onlyIfMissing);