Fix link to the repo where the python script for generating the codata constants.

Author: MilanSkocic

doc/specs/stdlib_constants.md

@@ -14,7 +14,7 @@ The [[stdlib_constants]] module provides mathematical constants and the most com
 
 The [[stdlib_codata(module)]] module defines all codata (physical) constants as derived 
 type. The module is automatically generated with a simple 
-[parser written in Python](https://github.com/MilanSkocic/codata/tree/dev/stdlib)
+[parser written in Python](https://github.com/MilanSkocic/codata/)
 The latest codata constants were released in 2022 by the [NIST](http://physics.nist.gov/constants)
 All values for the codata constants are provided as double precision reals. 
 The names are quite long and can be aliased with shorter names.