Fix content type docs

docs/language-basics/enums.md

@@ -51,10 +51,10 @@ or float
 
 ```typespec
 enum Hour {
-  Zero = 0,
-  Quarter = 0.25,
-  Half = 0.5,
-  ThreeQuarter = 0.75,
+  Zero: 0,
+  Quarter: 0.25,
+  Half: 0.5,
+  ThreeQuarter: 0.75,
 }
 ```
 

docs/standard-library/http/content-types.md

@@ -2,20 +2,15 @@
 
 ## Default behavior
 
-Depending on the body of the operation http library will assume different content types:
-
-- `bytes`: `application/octet-stream`
-- `string`: `text/plain`
-- otherwise `application/json`
+Content type is assumed to be `application/json` by default regardless of the type of the request or response body.
 
 **Examples:**
 
 ```typespec
-op download(): bytes; // response content type is application/octet-stream
-op upload(@body file: bytes): void; // request content type is application/octet-stream
-op getContent(): string; // response content type is text/plain
+op download(): bytes; // Returns a json string with the bytes serialized as a base64.
+op getContent(): string; // Returns a json string
 op getPet(): {
-  // response content type is application/json
+  // Json object with a name property.
   name: string;
 };
 ```