SQLObject Update Whole benchmark - use obj.set

[scyclops]

Instead of:

https://github.com/tortoise/orm-benchmarks/blob/ff2a5875f802ac0c6ea1bee57eb87efcc5b052cb/benchmarks/sqlobject/test_i.py#L14-L15

Use obj.set like below for better performance from SQLObject:

obj.set(
  level=choice(LEVEL_CHOICE),
  text=f"{obj.text} Update"
)