Changed ft of latex (lervag/vimtex) to correct 'tex' value. Need to run PackerInstall, Compile etc to make it work after this change. (#670)

lua/plugins.lua

@@ -416,8 +416,8 @@ return require("packer").startup(function(use)
 
     -- LANGUAGE SPECIFIC GOES HERE
 
-    -- Latex TODO what filetypes should this be active for?
-    use {"lervag/vimtex", ft = "latex"}
+    use {"lervag/vimtex", ft = "tex"   }
+    
 
     -- Rust tools
     -- TODO: use lazy loading maybe?