all: Upgrade to ruff v0.9.6.

Signed-off-by: Christian Clauss <cclauss@me.com>

tests/cpydiff/core_import_path.py

@@ -4,6 +4,7 @@ description: __path__ attribute of a package has a different type (single string
 cause: MicroPython doesn't support namespace packages split across filesystem. Beyond that, MicroPython's import system is highly optimized for minimal memory usage.
 workaround: Details of import handling is inherently implementation dependent. Don't rely on such details in portable applications.
 """
+
 import modules
 
 print(modules.__path__)