ci: update header for run_role_with_clear_facts [citest_skip]

Update header for run_role_with_clear_facts to indicate not editable
and clarify what it does

Signed-off-by: Rich Megginson <rmeggins@redhat.com>

Author: richm

tests/tasks/run_role_with_clear_facts.yml

@@ -1,12 +1,11 @@
 ---
-# Task file: save facts, clear_facts, run linux-system-roles.network, then restore facts.
-# Include this with include_tasks or import_tasks; ensure tests/library is in module search path.
+# DO NOT EDIT THIS FILE - managed by linux-system-roles/.github
+# Task file: clear_facts, run linux-system-roles.network.
+# Include this with include_tasks or import_tasks
 # Input:
 # - __sr_tasks_from: tasks_from to run - same as tasks_from in include_role
 # - __sr_public: export private vars from role - same as public in include_role
 # - __sr_failed_when: set to false to ignore role errors - same as failed_when in include_role
-# Output:
-# - ansible_facts: merged saved ansible_facts with ansible_facts modified by the role, if any
 - name: Clear facts
   meta: clear_facts