python: release as 0.6.1

Reviewed-on: #414

Author: chrysn

lakers-python/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "lakers-python" # this will be the name of the package on pypi
 edition = "2021"
-version ="0.6.1-rc1"
+version ="0.6.1"
 repository.workspace = true
 license.workspace = true
 description = "An implementation of EDHOC, written in Rust"