include fldread improvement to the change list for 4.2.1

source/changes.rst

@@ -49,6 +49,7 @@ List of the main bugfixes in the new 4.2.1 release - May 2023
 **Input Output Manager**
 
 - Enable the use of XIOS3 to create outputs and handle restart files by means of `key_xios3` (:mergereq:`267`)
+- Possibility to shift the record from the middle of the forcing period to the beginning or the end when using temporal interpolation with `fldread` (:mergereq:`311`)
 
 **Diagnostics**