importlib check example can actually import things

[hauntsaninja]

The example at https://docs.python.org/3/library/importlib.html#checking-if-a-module-can-be-imported is misleading:

Checking if a module can be imported
If you need to find out if a module can be imported without actually doing the import, then you should use importlib.util.find_spec().

But importlib.util.find_spec will import parent modules if a submodule is provided https://docs.python.org/3/library/importlib.html#importlib.util.find_spec

If name is for a submodule (contains a dot), the parent module is automatically imported.

Users reading this example probably do not expect anything to get imported at all