(docs) JSON entries were duplicated (#4287)

The ones below are in the correct alphabetical order.

Author: LukeCz

SUPPORTED_LANGUAGES.md

@@ -113,13 +113,11 @@ The table below shows the full list of languages (and corresponding classes/alia
 | Inform7                 | inform7, i7            |         |
 | Ini, TOML               | ini, toml              |         |
 | Iptables                | iptables               | [highlightjs-iptables](https://github.com/highlightjs/highlightjs-iptables) |
-| JSON                    | json, jsonc, json5     |         |
-| JSONata                 | jsonata                | [highlightjs-jsonata](https://github.com/DevDimov/highlightjs-jsonata) |
 | IRPF90                  | irpf90                 |         |
 | Java                    | java, jsp              |         |
 | JavaScript              | javascript, js, jsx    |         |
 | Jolie                   | jolie, iol, ol         | [highlightjs-jolie](https://github.com/xiroV/highlightjs-jolie) |
-| JSON                    | json, jsonc            |         |
+| JSON                    | json, jsonc, json5     |         |
 | JSONata                 | jsonata                | [highlightjs-jsonata](https://github.com/DevDimov/highlightjs-jsonata) |
 | Julia                   | julia, jl               |         |
 | Julia REPL              | julia-repl             |         |