update link for the react priorities levels

[LahiaOmar]

Just an update for the link to the React Scheduler Priorities list.

[theFreedomBanana]

New link until it's fixed https://github.com/facebook/react/blob/main/packages/scheduler/src/SchedulerPriorities.js

[sckimynwa]

I think pendingWorkPriority sections should be updated. 🤔
In my opinion, after Lanes were introduced, FiberNode Implementations does not have any "priorities". instead it has "Lanes"

[FiberNode Implementation]

  /**
   * Each filer knows
   * 1. priorities for the work of itself - lanes
   * 2. priorities for the work of its descendant - childLanes
   */
  this.lanes = NoLanes;
  this.childLanes = NoLanes;

any ideas ? @LahiaOmar @theFreedomBanana