Updated prompt to extract text and format it in Markdown, including a…

[dzemeuksis]

Updated prompt to extract text and format it in Markdown, including additional visual details, instead of only describing the image.

The markitdown module is designed to extract text from various documents and save it in Markdown format, as stated in its purpose. This change aligns the default behavior of image processing with the overall goal of the module.

Previously, providing an image resulted in a plain text description, which likely did not meet user expectations. Users are more likely to expect extracted text and formatting when supplying an image, making this change a better fit for the module's intended functionality.

[dzemeuksis]

@microsoft-github-policy-service agree