docs: update image links in Valetudo AI showcase to use markdown syntax

Author: kesku

docs/showcase/valetudo-ai.mdx

@@ -52,15 +52,15 @@ See Valetudo AI in action:
 ## Screenshots
 
 ### Home Interface
-<img src="https://github.com/vero-code/valetudo-ai/blob/master/screenshots/1-home.png" alt="Home screen" width="800" />
+![Home screen](https://raw.githubusercontent.com/vero-code/valetudo-ai/refs/heads/master/screenshots/1-home.png)
 
 ### Prompt Templates
-<img src="https://github.com/vero-code/valetudo-ai/blob/master/screenshots/10-prompts.png" alt="Prompt templates" width="800" />
+![Prompt templates](https://raw.githubusercontent.com/vero-code/valetudo-ai/refs/heads/master/screenshots/10-prompts.png)
 
 ### Image Upload
-<img src="https://github.com/vero-code/valetudo-ai/blob/master/screenshots/8-image-upload.png" alt="Image upload" width="800" />
+![Image upload](https://raw.githubusercontent.com/vero-code/valetudo-ai/refs/heads/master/screenshots/8-image-upload.png)
 
 ### Date & Location Filters
-<img src="https://github.com/vero-code/valetudo-ai/blob/master/screenshots/7-date-filter.png" alt="Date filter" width="800" />
+![Date filter](https://raw.githubusercontent.com/vero-code/valetudo-ai/refs/heads/master/screenshots/7-date-filter.png)
 
-<img src="https://github.com/vero-code/valetudo-ai/blob/master/screenshots/9-location-filter.png" alt="Location filter" width="800" />
+![Location filter](https://raw.githubusercontent.com/vero-code/valetudo-ai/refs/heads/master/screenshots/9-location-filter.png)