Version.njk: Update to container version 4bebc96 (#384)

Main reason to update is to pick up the latest Ubuntu container build
that uses Python 3.12.

A complete list of changes compared to the previous container version
(`d1e4ff1`) is in:

d1e4ff1...4bebc96

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

.sync/Version.njk

@@ -37,7 +37,7 @@
 {% set previous_mu_release_branch = "release/202311" %}
 
 {# The version of the ubuntu-22-build container to use. #}
-{% set linux_build_container = "ghcr.io/microsoft/mu_devops/ubuntu-22-build:d1e4ff1" %}
+{% set linux_build_container = "ghcr.io/microsoft/mu_devops/ubuntu-22-build:4bebc96" %}
 
 {# The Python version to use. #}
 {% set python_version = "3.12" %}