Update base image tag in tools.Dockerfile to base.master.f6ead934.20260629.1 #631

Summary

Update the base image tag in linux/tools.Dockerfile as part of the witty_wolf base image release.

Change Required

In linux/tools.Dockerfile, update the ARG IMAGE_LOCATION line:

From:

ARG IMAGE_LOCATION=mcr.microsoft.com/azure-cloudshell:base.master.894ed5cf.20260518.1

To:

ARG IMAGE_LOCATION=mcr.microsoft.com/azure-cloudshell:base.master.f6ead934.20260629.1

This is the only change needed. No other files should be modified.