fedora-intune: install Defender from Microsoft's Fedora 44 repo

The RHEL 10 repo was there for the Intune app, which only ships for RHEL;
that app is gone and the repo now only provides mdatp. Use Microsoft's
Fedora 44 repo instead: Fedora is a supported Defender distribution
(servers and the Linux desktop preview), and it carries a newer build
(101.26091.0003 vs 101.26081.0010 in the RHEL 10 repo). Same signing key
and signed metadata.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

images/fedora-intune/manifest.yaml

@@ -27,7 +27,7 @@ opt-usrlocal: root
 
 repos:
   - himmelblau
-  - microsoft-rhel10
+  - microsoft-fedora44
   - microsoft-edge
 
 include: