[tests/fonts] rhel9: Replace tips for how to install local rpms for testing

[Akira TAGOH <akira@tagoh.org>]

A new commit has been pushed.

Repo   : tests/fonts
Branch : rhel9
Commit : ec1a2c0402d0ef40f0b518bb12d14d12b58e89e9
Author : Akira TAGOH <akira@tagoh.org>
Date   : 2025-12-01T17:53:53+09:00
Stats  : +5/-9 in 1 file(s)
URL    : https://src.fedoraproject.org/tests/fonts/c/ec1a2c0402d0ef40f0b518bb12d14d12b58e89e9?branch=rhel9

Log:
Replace tips for how to install local rpms for testing

---
diff --git a/README.rst b/README.rst
index 9d157ad..73aa5e8 100644
--- a/README.rst
+++ b/README.rst
@@ -189,17 +189,13 @@ FAQ
 
 - Unable to run ``tmt run`` locally.
 
-  You may want to add the following snippet into your fmf plan file.
-  Please note that a package set to ``package:`` will be pulled from
-  the official repo. it may not contains any changes you may made in
-  your repo::
+  prepare install plugin in tmt support installing local rpms:
 
-    prepare:
-      name: tmt
-      how: install
-      package: <package name to test>
+	tmt run --all prepare --insert --how install --package /path/to/the/package.rpm
 
-  or ``fontrpmspec-gentmt -a`` if you use fontrpmspec to generate.
+  or
+
+	tmt run --all prepare --insert --how install --directory /path/to/the/directory/with/packages
 
 - How to deal with TrueType/OpenType Collection format?