vim-patch:9.0.0599: latexmkrc files are not recognized

Problem:    Latexmkrc files are not recognized.
Solution:   Use Perl filetype for latexmkrc files. (closes vim/vim#11241)
cde0319385

runtime/lua/vim/filetype.lua

@@ -1496,6 +1496,8 @@ local filename = {
   ['/etc/shadow-'] = 'passwd',
   ['/etc/shadow'] = 'passwd',
   ['/etc/passwd.edit'] = 'passwd',
+  ['latexmkrc'] = 'perl',
+  ['.latexmkrc'] = 'perl',
   ['pf.conf'] = 'pf',
   ['main.cf'] = 'pfmain',
   pinerc = 'pine',