vim-patch:9.0.0497: LyRiCs files are not recognized (#20239)

Problem:    LyRiCs files are not recognized.
Solution:   Add a pattern to detect LyRiCs files. (closes vim/vim#11155)
65ee49decf

src/nvim/testdir/test_filetype.vim

@@ -327,6 +327,7 @@ let s:filename_checks = {
     \ 'lss': ['file.lss'],
     \ 'lua': ['file.lua', 'file.rockspec', 'file.nse'],
     \ 'lynx': ['lynx.cfg'],
+    \ 'lyrics': ['file.lrc'],
     \ 'm3build': ['m3makefile', 'm3overrides'],
     \ 'm3quake': ['file.quake', 'cm3.cfg'],
     \ 'm4': ['file.at'],