Remove example interpreter pins and lint snippets for Python 3.11

Author: Kludex

examples/clients/simple-chatbot/.python-version

@@ -134,7 +134,8 @@ def test_docs_examples(example: CodeExample, eval_example: EvalExample):
     ruff_ignore: list[str] = ["F841", "I001", "F821"]  # F821: undefined names (snippets lack imports)
 
     # Use project's actual line length of 120
-    eval_example.set_config(ruff_ignore=ruff_ignore, target_version="py310", line_length=120)
+    eval_example.set_config(ruff_ignore=ruff_ignore, line_length=120)
+    eval_example.config.target_version = "py311"
 
     # Use Ruff for both formatting and linting (skip Black)
     if eval_example.update_examples:  # pragma: no cover