chore: bump ruff's python version in pyproject toml

Author: plfavreau

pyproject.toml

@@ -87,8 +87,7 @@ exclude = [
 line-length = 100
 indent-width = 4
 
-# Assume Python 3.9
-target-version = "py39"
+target-version = "py312"
 
 [tool.ruff.lint]
 # Enable Pyflakes (`F`) and a subset of the pycodestyle (`E`) codes by default.