feat: add icons for Ghost and Symantec

Signed-off-by: Jack Cherng <jfcherng@gmail.com>

disk_root/ventoy/ventoy.json

@@ -45,6 +45,10 @@
             "key": "Federa-",
             "class": "federa"
         },
+        {
+            "key": "Ghost",
+            "class": "ghost"
+        },
         {
             "key": "linuxmint-",
             "class": "linuxmint"
@@ -57,6 +61,10 @@
             "key": "openSUSU-",
             "class": "opensuse"
         },
+        {
+            "key": "Symantec",
+            "class": "symantec"
+        },
         {
             "key": "Win7",
             "class": "windows_7"