[fidl][docs] Correct enum separator in docs

FIDL2 separates enum values with semicolons, but the docs indicated
commas. This corrects the docs to match the implementation.

Change-Id: I2923165556568b59a738c85476e08c90f843759d
diff --git a/docs/fidl/language.md b/docs/fidl/language.md
index 3d0fd63..cb6691a 100644
--- a/docs/fidl/language.md
+++ b/docs/fidl/language.md
@@ -259,27 +259,27 @@
 ```
 // An enum declared at library scope.
 enum Beverage : uint8 {
-    WATER = 0,
-    COFFEE = 1,
-    TEA = 2,
-    WHISKEY = 3,
+    WATER = 0;
+    COFFEE = 1;
+    TEA = 2;
+    WHISKEY = 3;
 };
 
 // An enum declared at library scope.
 // Underlying type is assumed to be uint32.
 enum Vessel {
-    CUP = 0,
-    BOWL = 1,
-    TUREEN = 2,
-    JUG = 3,
+    CUP = 0;
+    BOWL = 1;
+    TUREEN = 2;
+    JUG = 3;
 };
 
 // An enum declared within an interface scope.
 interface VendingMachine {
     enum PaymentMethod {
-        CASH = 0,
-        CREDIT = 1,
-        HONOR_SYSTEM = 2,
+        CASH = 0;
+        CREDIT = 1;
+        HONOR_SYSTEM = 2;
     };
 };
 ```