Update common Docker engineering infrastructure from mcr.microsoft.com/dotnet-buildtools/image-builder@sha256:a448063e938c5c186c25a64e36c4f1e9a755c346b5007d9f3fbfd846ac4514e4

Author: dotnet-docker-bot

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

@@ -1,5 +1,5 @@
 variables:
-  imageNames.imageBuilderName: mcr.microsoft.com/dotnet-buildtools/image-builder@sha256:dcdb77ff5949428304c100358a4c88030b9fce9f53edaa23f01b22f637c659c7
+  imageNames.imageBuilderName: mcr.microsoft.com/dotnet-buildtools/image-builder@sha256:a448063e938c5c186c25a64e36c4f1e9a755c346b5007d9f3fbfd846ac4514e4
   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