Associate *.sarif files with json syntax (#2695)

* Associate `*.sarif` files with `json` syntax

* Update changelog for #2695

CHANGELOG.md

@@ -21,6 +21,7 @@
 - Associate `Containerfile` with `Dockerfile` syntax, see #2606 (@einfachIrgendwer0815)
 - Replaced quotes with double quotes so fzf integration example script works on windows and linux. see #2095 (@johnmatthiggins)
 - Associate `ksh` files with `bash` syntax, see #2633 (@johnmatthiggins)
+- Associate `sarif` files with `JSON` syntax, see #2695 (@rhysd)
 - Associate `ron` files with `rust` syntax, see #2427 (@YeungOnion)
 - Add support for [WebGPU Shader Language](https://www.w3.org/TR/WGSL/), see #2692 (@rhysd)