Add to behavior docs RemoveDefaultTableBehaviorPlugin

[benjie]

From Discord (https://discord.com/channels/489127045289476126/498852330754801666/1451006532006314075):

/**
 * Remove insert/update/delete from tables by default
 */
export const RemoveDefaultTableBehaviorPlugin: GraphileConfig.Plugin = {
  name: 'RemoveDefaultTableBehaviorPlugin',
  version: '1.0.0',
  schema: {
    entityBehavior: {
      pgResource: {
        inferred(behavior) {
          return ['-resource:delete', '-insert', '-update', behavior]
        },
      },
    },
  },
}

(Should that not be -resource:insert, -resource:update?)