docs: reorder imperative languages alphabetically

README.md

@@ -27,10 +27,10 @@ Feel free to take a look. You might learn new things. They have been designed to
 
 - [C](languages/C.txt)
 - [C#](languages/C%23.txt)
-- [PHP](languages/php.php)
-- [JAVA](languages/java.md)
-- [Python](languages/python.md)
 - [Go](languages/golang.md)
+- [Java](languages/java.md)
+- [PHP](languages/php.php)
+- [Python](languages/python.md)
 
 #### Functional