Update 7-animation/2-css-animations/article.md

Co-authored-by: Muhammed Zakir <8190126+MuhammedZakir@users.noreply.github.com>

Author: peachesontour

7-animation/2-css-animations/article.md

@@ -141,7 +141,7 @@ The timing function can be set as a [Bezier curve](/bezier-curve) with 4 control
 
 1. First control point: `(0,0)`.
 2. Last control point: `(1,1)`.
-3. For intermediate points the values of `x` must be in the interval `0..1`, `y` can be anything.
+3. For intermediate points, the values of `x` must be in the interval `0..1`, `y` can be anything.
 
 The syntax for a Bezier curve in CSS: `cubic-bezier(x2, y2, x3, y3)`. Here we need to specify only 2nd and 3rd control points, because the 1st one is fixed to `(0,0)` and the 4th one is `(1,1)`.