Add YAML file type icon (#7185)

Add YAML file type icon from
[file-icons/icons](https://github.com/file-icons/icons)

https://github.com/file-icons/icons/blob/master/svg/YAML.svg
Release Notes:
- Added YAML file type icon.

---------

Co-authored-by: d1y <chenhonzhou@gmail.com>

assets/icons/file_icons/file_types.json

@@ -109,8 +109,8 @@
         "xls": "document",
         "xlsx": "document",
         "xml": "template",
-        "yaml": "settings",
-        "yml": "settings",
+        "yaml": "yaml",
+        "yml": "yaml",
         "zlogin": "terminal",
         "zsh": "terminal",
         "zsh_aliases": "terminal",
@@ -174,6 +174,9 @@
         "php": {
             "icon": "icons/file_icons/php.svg"
         },
+        "yaml": {
+            "icon": "icons/file_icons/yaml.svg"
+        },
         "prettier": {
             "icon": "icons/file_icons/prettier.svg"
         },

assets/icons/file_icons/yaml.svg

@@ -0,0 +1 @@
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="457px" height="512px"><polygon points="342.0159302,0 457,0 114.9831009,512 0,512 171.0082092,256 0,0 114.9831009,0 228.4997559,169.9342041 "/></svg>