feat: add waybar/config to ftdetect

[Waybar](https://github.com/Alexays/Waybar) is another project which
uses JSON-with-comments for its configuration file.

Signed-off-by: Kevin Locke <[email protected]>

Author: kevinoid

ftdetect/jsonc.vim

@@ -29,4 +29,6 @@ augroup jsoncFtdetect
     autocmd BufNewFile,BufRead coffeelint.json setlocal filetype=jsonc
     " https://github.com/microsoft/TypeScript/pull/5450
     autocmd BufNewFile,BufRead tsconfig.json setlocal filetype=jsonc
+    " https://github.com/Alexays/Waybar/wiki/Configuration
+    autocmd BufNewFile,BufRead */waybar/config setlocal filetype=jsonc
 augroup END