Add .items() method to "Spintting out keys and values"

[Scottan]

splitting-out-keys-and-values

As well as the keys() and values() methods, we should also introduce the items() method, which I personally find the most useful:

https://www.w3schools.com/python/ref_dictionary_items.asp

We should also add an example of using the .items() method in a for loop:

for key, item in dict.items():
    print(f"key {key} links to item {item}")