Added/Updated tests\bugs\gh_7998_test.py: Minor correction in comments

Author: pavel-zotov

tests/bugs/gh_7998_test.py

@@ -21,7 +21,7 @@
     Added [temporary] mark for SKIP this test when QA runs agains *fork* of standard FB because it hangs ('disabled_in_forks').
     This mark will be removed after separating QA runs (executing tests against standard FB snapshot on DEDICATED machine).
 
-    NB-1. QA must use command like: 'pytest -m "not disabled_in_hqbird" ...' when check *fork* of standard FB.
+    NB-1. QA must use command like: 'pytest -m "not disabled_in_forks" ...' when check *fork* of standard FB.
     NB-2. Unfortunately, nowadays QA runs for standard FB and its fork are performed at the same host.
           Lagging problem exists with [back-]porting of some fixes/features into fork after implementation for the same FB-major version.
           This can cause the whole QA-job to be incompleted and missed report for one of even several days.