Small update to Readme.

Author: scott-griffiths

README.md

@@ -17,7 +17,7 @@ It has been maintained since 2006 and now has many millions of downloads per yea
 
 News
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-**7th September 2023**: bitstring 4.1.2 released. Version 4.1 is a large update in terms of how much of the code has changed.
+**November 2023**: bitstring 4.1.3 released. Version 4.1 is a large update in terms of how much of the code has changed.
 
 * Speed increased with bitarray dependency.
 * New Array class for homogeneous data.