[main] Update common Docker engineering infrastructure with latest (#6828)

Author: dotnet-docker-bot

eng/common/templates/jobs/cg-build-projects.yml

@@ -7,7 +7,7 @@ parameters:
   type: boolean
   default: false
   displayName: CG Dry Run
-# See https://learn.microsoft.com/dotnet/core/tools/dotnet-install-script#options for possible Channel values
+# See https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-install-script#options for possible Channel values
 - name: dotnetVersionChannel
   type: string
   default: '9.0'

eng/common/templates/variables/docker-images.yml

@@ -1,5 +1,5 @@
 variables:
-  imageNames.imageBuilderName: mcr.microsoft.com/dotnet-buildtools/image-builder:2830238
+  imageNames.imageBuilderName: mcr.microsoft.com/dotnet-buildtools/image-builder:2839606
   imageNames.imageBuilder: $(imageNames.imageBuilderName)
   imageNames.imageBuilder.withrepo: imagebuilder-withrepo:$(Build.BuildId)-$(System.JobId)
   imageNames.testRunner: mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux3.0-docker-testrunner