Cervical spondylosis covers a wide range of severity of "wear and tear" in the neck (same thing..........). it depends on your individual situation- in most instances, I would say, if it makes you feel better- go for it, - the only exception really being if your neck is very vulnerable in some way- instability, or significant cord compression- but if that were the case, I would not expect running to ease the symptoms.
The only person who can really give you proper advice is whoever diagnosed the problem, as they'll know the extent of the problem. Good luck!
