documentation: Update code generation documentation
# Code generation
-Philadelphia uses code generation for the FIX protocol versions from FIX 4.2
+Philadelphia uses code generation for the FIX protocol versions from FIX 4.0
to FIX Latest.
As Philadelphia already contains the output of the code generation process,
@@ -13,6 +13,8 @@ Code generation requires Bash and Python 3.7 or newer.
The following FIX protocol versions use [FIX Repository][] as their source:
+ - FIX 4.0
+ - FIX 4.1
- FIX 4.2
- FIX 4.3
- FIX 4.4
