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/defender.yaml

@@ -1,5 +1,5 @@
-# Microsoft Defender for Endpoint on Linux (mdatp), RHEL 10 build, from the
-# microsoft-rhel10 repo (repos/microsoft.repo).
+# Microsoft Defender for Endpoint on Linux (mdatp), Fedora 44 build, from the
+# microsoft-fedora44 repo (repos/microsoft.repo).
 #
 # mdatp's %post does the real install: units, SELinux module, and per-machine
 # state under /var/opt/microsoft/mdatp (machine GUID, definitions database,
@@ -11,7 +11,7 @@
 # from the Defender portal on the device.
 
 repo-packages:
-  - repo: microsoft-rhel10
+  - repo: microsoft-fedora44
     packages:
       - mdatp