vim-patch:8.2.3598: RouterOS filetype is not recognized

Problem:    RouterOS filetype is not recognized.
Solution:   Add file and script patterns. (closes vim/vim#9097)
0818ab82e7

src/nvim/testdir/test_filetype.vim

@@ -419,6 +419,7 @@ let s:filename_checks = {
     \ 'rnc': ['file.rnc'],
     \ 'rng': ['file.rng'],
     \ 'robots': ['robots.txt'],
+    \ 'routeros': ['file.rsc'],
     \ 'rpcgen': ['file.x'],
     \ 'rpl': ['file.rpl'],
     \ 'rst': ['file.rst'],
@@ -659,6 +660,7 @@ let s:script_checks = {
       \ 'yaml': [['%YAML 1.2']],
       \ 'pascal': [['#!/path/instantfpc']],
       \ 'fennel': [['#!/path/fennel']],
+      \ 'routeros': [['#!/path/rsc']],
       \ }
 
 " Various forms of "env" optional arguments.