fix build: descriptive text

Author: himanshujariyal

src/content/en/2025/performance.md

@@ -479,7 +479,7 @@ chart_url="https://docs.google.com/spreadsheets/d/e/2PACX-1vSdGtVc2AYakM2cNaGLtp
   )
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-The median number of unsized images per web page is two. At the 90th percentile, this number increases sharply to 26 on desktop and 23 on mobile. Unsized images increase the risk of layout shift. However, their actual impact on CLS depends on both the size of the image and how far content shifts when it loads, especially if the shift affects the viewport. CLS is calculated based on the impact fraction (how much of the viewport is affected) and the distance fraction (how far elements move), meaning larger images or shifts closer to the top of the page tend to contribute more heavily to CLS. The full calculation details are explained [here](https://web.dev/articles/cls#layout-shift-score-calculation).
+The median number of unsized images per web page is two. At the 90th percentile, this number increases sharply to 26 on desktop and 23 on mobile. Unsized images increase the risk of layout shift. However, their actual impact on CLS depends on both the size of the image and how far content shifts when it loads, especially if the shift affects the viewport. CLS is calculated based on the impact fraction (how much of the viewport is affected) and the distance fraction (how far elements move), meaning larger images or shifts closer to the top of the page tend to contribute more heavily to CLS.
 
 {{ figure_markup(
   image="unsized-images-by-height.png",