Fixed typo in doc of juce_WebInputStream.h

modules/juce_core/network/juce_WebInputStream.h

@@ -42,7 +42,7 @@ class JUCE_API WebInputStream : public InputStream
 
         @param url      The url that should be retrieved. This parameter may also contain
                         post data and/or parameters.
-        @param usePost  Specifies wheather a GET or a POST command should be used. This
+        @param usePost  Specifies whether a GET or a POST command should be used. This
                         parameter will also influence the way parameters are encoded.
     */
     WebInputStream (const URL& url, const bool usePost);