.sync/Version.njk: Update Mu repos to Mu DevOps v9.1.6 (#324)

Changes since last release:
v9.1.5...v9.1.6

General release info: https://github.com/microsoft/mu_devops/releases

---

Includes:

- Sync RustSetupSteps.yml to use cargo-binstall to install cargo binary
tools (#320)
- Update RustSetupSteps.yml (#321)
- Repo File Sync: synced file(s) with microsoft/mu_devops (#322)
- .sync/workflows/codeql: Use Version.njk cargo-make version (#323)

In particular, including #320 in this tag allows downstream repos to use
the changes.

Signed-off-by: Michael Kubacki <[email protected]>

.sync/Version.njk

@@ -30,7 +30,7 @@
 #}
 
 {# The git ref value that files dependent on this repo will use. #}
-{% set mu_devops = "v9.1.5" %}
+{% set mu_devops = "v9.1.6" %}
 
 {# The latest Project Mu release branch value. #}
 {% set latest_mu_release_branch = "release/202311" %}