The NIV version is the only one that calls it that. All other versions says
American Standard Version
And thou saidst in thy heart, I will ascend into heaven, I will exalt my throne above the stars of God; and I will sit upon the mount of congregation, in the uttermost parts of the north;
Berean Study Bible
You said in your heart: “I will ascend to the heavens; I will raise my throne above the stars of God. I will sit on the mount of assembly, in the far reaches of the north.
Douay-Rheims Bible
And thou saidst in thy heart: I will ascend into heaven, I will exalt my throne above the stars of God, I will sit in the mountain of the covenant, in the sides of the north.
English Revised Version
And thou saidst in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God; and I will sit upon the mount of congregation, in the uttermost parts of the north:
King James Bible
For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north:
World English Bible
You said in your heart, "I will ascend into heaven! I will exalt my throne above the stars of God! I will sit on the mountain of assembly, in the far north!
Young's Literal Translation
And thou saidst in thy heart: the heavens I go up, Above stars of God I raise my throne, And I sit in the mount of meeting in the sides of the north.
As do all the others like the Greek Septuagint, Aramaic bible and Ethiopian bible.