vim-patch:8.2.4424: ".gts" and ".gjs" files are not recognized (#17464)

Problem:    ".gts" and ".gjs" files are not recognized.
Solution:   Recognize Glimmer flavored typescript and javascript.
            (closes vim/vim#9799)
cdf717283c

runtime/lua/vim/filetype.lua

@@ -247,6 +247,8 @@ local extension = {
   gradle = "groovy",
   groovy = "groovy",
   gsp = "gsp",
+  gjs = "javascript.glimmer",
+  gts = "typescript.glimmer",
   hack = "hack",
   hackpartial = "hack",
   haml = "haml",