(enh) Add Ballerina to supported languages (#3852)

Author: YasithD

CHANGES.md

@@ -16,6 +16,7 @@ New Grammars:
 
 - added 3rd party x86asmatt grammar to SUPPORTED_LANGUAGES [gondow][]
 - added 3rd party riscv64 grammar to SUPPORTED_LANGUAGES [aana-h2][]
+- added 3rd party Ballerina grammar to SUPPORTED_LANGUAGES [Yasith Deelaka][]
 
 Core Grammars:
 
@@ -60,6 +61,7 @@ Dev tool:
 [jchavarri]: https://github.com/jchavarri
 [aana-h2]: https://github.com/aana-h2
 [Nicholas Thompson]: https://github.com/NAThompson
+[Yasith Deelaka]: https://github.com/YasithD
 
 
 ## Version 11.8.0

SUPPORTED_LANGUAGES.md

@@ -29,6 +29,7 @@ The table below shows the full list of languages (and corresponding classes/alia
 | AutoHotkey              | autohotkey             |         |
 | AutoIt                  | autoit                 |         |
 | Awk                     | awk, mawk, nawk, gawk  |         |
+| Ballerina               | ballerina, bal         | [highlightjs-ballerina](https://github.com/highlightjs/highlightjs-ballerina) |
 | Bash                    | bash, sh, zsh          |         |
 | Basic                   | basic                  |         |
 | BBCode                  | bbcode                 | [highlightjs-bbcode](https://github.com/RedGuy12/highlightjs-bbcode) |