コメントがついていた部分の修正

指摘された点直しました。

- タイトルの「ペイント」を「描画」に修正

以下の段落で、@1000ch より指摘された訳の誤りを直しておきました

> If you animate any of the above properties the element(s) affected are repainted, and the layers they belong to are uploaded to the GPU.
> On mobile devices this is particularly expensive because CPUs are significantly less powerful than their desktop counterparts, meaning that the painting work takes longer;
> and the bandwidth between the CPU and GPU is limited, so texture uploads take a long time.