Update custom.txt

Author: Thutmose3

docs/custom.txt

@@ -23,10 +23,10 @@ The documentation on CSSContainer is a bit under-developed, more documentation c
 -----------------------------------------------------------------------------
 
 Example:
-```CRISPY_TAILWIND_STYLE = {
+CRISPY_TAILWIND_STYLE = {
     "text": "bg-gray-50 border border-gray-300",
     "select": "bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500",
-}```
+}
 
 This is currently only working for the input fields and the select field. More coming soon.