MAINTAINERS: Update the files in the FreeBSD section

The FreeBSD CI definitions now reside in other files than .cirrs.yml.
Update the entry in MAINTAINERS accordingly.

Message-Id: <20220217141138.917292-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 68adaac..dd8ad55 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3608,7 +3608,8 @@
 M: Ed Maste <emaste@freebsd.org>
 M: Li-Wen Hsu <lwhsu@freebsd.org>
 S: Maintained
-F: .cirrus.yml
+F: .gitlab-ci.d/cirrus/freebsd*
+F: tests/vm/freebsd
 W: https://cirrus-ci.com/github/qemu/qemu
 
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