Update developers.mdx (#3085)

Screen readers announce images as “image”, so alternative text which contains “image of”, “picture of”, or similar text result in redundant information being announced to users. Example: “Image: picture of a puppy sleeping in cup.”

Avoiding “picture of” or similar phrases in alt text will reduce redundant announcements by assistive technologies.

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

src/pages/guidelines/accessibility/developers.mdx

@@ -135,7 +135,7 @@ attribute; otherwise the screen reader will read the whole image URL if the
 <Title>Be detailed and succinct</Title>
 
 ```html
-<img src="puppy.jpg" alt="Picture of a sleeping puppy in cup" />
+<img src="puppy.jpg" alt="Sleeping puppy in a cup" />
 ```
 
 <Title>Give decorative images an empty `alt` attribute.</Title>