fix(curriculum): update blog card's image tests (freeCodeCamp#59522)

Author: c0d1ng-ma5ter

curriculum/challenges/english/25-front-end-development/lab-blog-post-card/66eaddd04a9e533fba689001.md

@@ -233,15 +233,22 @@ const readMorePadding = getComputedStyle(readMore).padding;
 assert.notStrictEqual(readMorePadding, '0px');
 ```
 
-Your `.post-img` element should fill the card's `width` and have a `border-bottom` value.
+Your `.post-img` element should fill the card's `width`.
 
 ```js
 const postImg = document.querySelector('.post-img');
 assert.exists(postImg);
 
 const imgWidth = getComputedStyle(postImg).width;
 const cardWidth = getComputedStyle(postImg.parentElement).width;
-assert.strictEqual(imgWidth, cardWidth);
+assert.closeTo(Number(imgWidth.replace(/px/ig, "")), Number(cardWidth.replace(/px/ig, "")), 15);
+```
+
+Your `.post-img` element should have a `border-bottom` value.
+
+```js
+const postImg = document.querySelector('.post-img');
+assert.exists(postImg);
 
 const imgBorderBottom = getComputedStyle(postImg).borderBottomWidth;
 assert.notStrictEqual(imgBorderBottom, '0px');