Update README.md

Author: ikegee

README.md

@@ -29,7 +29,7 @@ Input JSON (json_example.json):
 ```
 ## Usage
 - ## Usage
-    Please see <span style="background-color: #FFFF00">json_print_example.txt</span>
+    Please see <span style="background-color: yellow">json_print_example.txt</span>
 
 - **Two Display Modes**:
   - Table View (`json_print_table.c`): Displays JSON arrays as formatted tables