chore(docs): reduced size of hero img

[zeroasterisk]

samples/personalized_learning switch from png -> jpg for hero image

[gemini-code-assist]

Code Review

This pull request updates the hero image from PNG to JPG to reduce its file size, which is a good optimization. My review includes suggestions to further improve this change by enhancing the image's accessibility with more descriptive alt text and considering further optimization of the JPG file to ensure the best balance of size and quality. These changes will improve both performance and accessibility for users viewing the documentation.

[gemini-code-assist]

This is a good change to reduce the image size. I have a couple of suggestions for improvement:

1. Accessibility: For better accessibility, the alt text could be more descriptive. Instead of 'Personalized Learning Demo', consider describing what the image visually represents, e.g., 'A screenshot of the Personalized Learning Demo showing a chat interface with interactive flashcards about ATP.' This helps users with screen readers understand the context provided by the image.
2. Image Optimization: To further reduce file size, consider running the JPG through an optimization tool like Squoosh or ImageOptim. Also, please verify that the JPG compression hasn't introduced visual artifacts, as PNG can sometimes be better for graphics with text.

[gemini-code-assist]

This is a good change to reduce the image size. I have a couple of suggestions for improvement:

1. Accessibility: For better accessibility, the alt text could be more descriptive. Instead of 'Personalized Learning Demo', consider describing what the image visually represents, e.g., 'A screenshot of the Personalized Learning Demo showing a chat interface with interactive flashcards about ATP.' This helps users with screen readers understand the context provided by the image.
2. Image Optimization: To further reduce file size, consider running the JPG through an optimization tool like Squoosh or ImageOptim. Also, please verify that the JPG compression hasn't introduced visual artifacts, as PNG can sometimes be better for graphics with text.