⬆️🪝 Update ruff and use automatic target-version inference (#255)

## Description

This small PR updates the configuration of the ruff pre-commit hook.
Since `v0.255`, the `target-version` configuration property can be
inferred directly, which allows to simplify the configuration.

## Checklist:

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- [x] The pull request only contains commits that are related to it.
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- [x] The pull request introduces no new warnings and follows the
project's style guidelines.

.pre-commit-config.yaml

@@ -50,7 +50,7 @@ repos:
 
   # Run ruff (subsumes pyupgrade, isort, flake8+plugins, and more)
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.254
+    rev: v0.0.256
     hooks:
       - id: ruff
         args: ["--fix"]

pyproject.toml

@@ -184,7 +184,6 @@ ignore = [
     "PLR2004", # Magic values
     "PLR0913", # Too many arguments
 ]
-target-version = "py38"
 
 # Exclude a variety of commonly ignored directories.
 exclude = [