ctests: update description for lyxbugs/6197

With an updated TeX Live 2022, LuaTeX no longer gives a missing
symbol for this test file (manual inspection confirms the symbols
are correctly displayed).

autotests/export/latex/lyxbugs/6197-polish-amssymb.lyx

@@ -1,12 +1,12 @@
 #LyX 2.4 created this file. For more info see https://www.lyx.org/
-\lyxformat 574
+\lyxformat 609
 \begin_document
 \begin_header
 \save_transient_properties true
 \origin unavailable
 \textclass article
 \use_default_options true
-\maintain_unincluded_children false
+\maintain_unincluded_children no
 \language polish
 \language_package default
 \inputencoding auto-legacy
@@ -18,7 +18,9 @@
 \font_default_family default
 \use_non_tex_fonts false
 \font_sc false
-\font_osf false
+\font_roman_osf false
+\font_sans_osf false
+\font_typewriter_osf false
 \font_sf_scale 100 100
 \font_tt_scale 100 100
 \use_microtype false
@@ -55,6 +57,7 @@
 \justification true
 \use_refstyle 1
 \use_minted 0
+\use_lineno 0
 \index Index
 \shortcut idx
 \color #008000
@@ -73,9 +76,13 @@
 \tablestyle default
 \tracking_changes false
 \output_changes false
+\change_bars false
+\postpone_fragile_content false
 \html_math_output 0
 \html_css_as_file 0
 \html_be_strict false
+\docbook_table_output 0
+\docbook_mathml_prefix 1
 \end_header
 
 \begin_body
@@ -127,7 +134,7 @@ lll which becomes
 \begin_inset Quotes prd
 \end_inset
 
- with pdfTeX and a missing symbol with LuaTeX..
+.
 \end_layout
 
 \end_body