Version.njk: Update n,n-1 to 202511, 202502 (#526)

Update version.njk to target 202511 and 202502 as the n and n-1
branches.

Author: apop5

.sync/Version.njk

@@ -33,8 +33,8 @@
 {% set mu_devops = "v18.0.2" %}
 
 {# The latest Project Mu release branch value. #}
-{% set latest_mu_release_branch = "release/202502" %}
-{% set previous_mu_release_branch = "release/202405" %}
+{% set latest_mu_release_branch = "release/202511" %}
+{% set previous_mu_release_branch = "release/202502" %}
 
 {# The version of the ubuntu-24-build container to use. #}
 {% set linux_build_container = "ghcr.io/microsoft/mu_devops/ubuntu-24-build:737aacc" %}