Case-sensitive JSON correction

Although enhanced colorization is enabled by default for C/C++, the JSON
as currently displayed in the docs raises an IntelliSense warning for an
invalid value due to incorrect capitalization. This groundbreaking
commit changes "E" to "e" and restores balance to the VS Code Docs.

docs/cpp/colorization-cpp.md

@@ -12,7 +12,7 @@ MetaDescription: How to customize semantic colorization of C++ code in Visual St
 The Visual Studio Code C/C++ extension now supports semantic colorization, when IntelliSense is enabled.  Use of enhanced colorization is controlled by the C_Cpp.enhancedColorization setting.  This setting is enabled by default.
 
 ```json
-"C_Cpp.enhancedColorization": "Enabled"
+"C_Cpp.enhancedColorization": "enabled"
 ```
 
 ## Themes