Add v1.1.1 changelog

CHANGELOG.md

+## v1.1.1 (14th August 2023)
+
+Bug fix release, because `libnacl` brought in a breaking change.
+
+- #206, !190: Fix `libnacl` version to 1.8.0
+- Fix deprecation warning about `typing.re.Pattern`
+- #194: Introduce `tests:3.11` job
+
+
 ## [v1.1.0](https://git.duniter.org/clients/python/duniterpy/-/milestones/18) (14th February 2022)
 
 ### Project