In addition to the other answers (yes you should use decouplers), the path length (so you can use the optimal path) for decoupling needs to be short relative to the output transition time.
ST has helpfully included that information in the datasheet:
Note that these are not propagation delays (which are listed beneath).
The name of the game in decoupling is to ensure that the decoupling path is short enough to not cause power pin droop due to transition effects; taking 0.1 of the output transition time determines a safe distance for the decoupling path.
Using the shortest time of 6ns is informative.
6nS on FR4 is about 3 feet, so getting to 10% of that (a useful rule of thumb) means the path should take less than 3.6 inches. The manhattan distance between the Vcc and ground pins on the device is just over 1 inch.
Even using the option on the left will not bring the decoupling path anywhere close to having any issues, so from a PCB decoupling perspective, either solution works.
Although this device lists transition times in the datasheet, many do not; newer devices will usually have an IBIS model which has (amongst other things) the same information in most cases.