Fix wrong-size header in `open-file-with-context-handler` (#14067)

crates/ruff_linter/src/rules/flake8_simplify/rules/open_file_with_context_handler.rs

@@ -31,7 +31,7 @@ use crate::checkers::ast::Checker;
 ///     ...
 /// ```
 ///
-/// # References
+/// ## References
 /// - [Python documentation: `open`](https://docs.python.org/3/library/functions.html#open)
 #[violation]
 pub struct OpenFileWithContextHandler;