docs: update docs for the i18n

https://web.tracklify.com/project/2b7ZVgE5/AdminForth/1265/Gl7AOVH1/add-svg-version-of-flag-into-i

Author: yaroslav8765

adminforth/documentation/docs/tutorial/08-Plugins/10-i18n.md

@@ -717,24 +717,28 @@ Response will look like this:
 
 ```
   "languages": [
-        {
-            "code": "en",
-            "nameOnNative": "English",
-            "nameEnglish": "English",
-            "emojiFlag": "🇺🇸"
-        },
-        {
-            "code": "uk",
-            "nameOnNative": "Українська",
-            "nameEnglish": "Ukrainian",
-            "emojiFlag": "🇺🇦"
-        },
-        {
-            "code": "ar",
-            "nameOnNative": "العربية",
-            "nameEnglish": "Arabic",
-            "emojiFlag": "🇦🇷"
-        },
+    {
+        "code": "en",
+        "nameOnNative": "English",
+        "nameEnglish": "English",
+        "emojiFlag": "🇺🇸",
+        "svgFlagB64": "data:image/svg+xml;base64,..."
+    },
+    {
+        "code": "uk",
+        "nameOnNative": "Українська",
+        "nameEnglish": "Ukrainian",
+        "emojiFlag": "🇺🇦",
+        "svgFlagB64": "data:image/svg+xml;base64...
+    },
+    {
+        "code": "ja",
+        "nameOnNative": "日本語",
+        "nameEnglish": "Japanese",
+        "emojiFlag": "🇯🇵",
+        "svgFlagB64": "data:image/svg+xml;base64..."
+    },
+  ]
 ```
 
 ### Disable translation for admin (external app only)