Merge pull request #5897 from Albertyang0/2025_07-Monthly-broken-links-fix-ay-101

2025_07 - Fix monthly broken links

Author: prmerger-automator[bot]

articles/search/samples-dotnet.md

@@ -79,7 +79,7 @@ A demo repo provides proof-of-concept source code for examples or scenarios show
 
 | Samples | Repository | Description |
 |---------|------------|-------------|
-| Covid-19 search app | [covid19search](https://github.com/liamca/covid19search) | Source code repository for the Azure AI Search based [Covid-19 Search App](https://covid19search.azurewebsites.net/). |
+| Covid-19 search app | [covid19search](https://github.com/liamca/covid19search) | Source code repository for the Azure AI Search based [Covid-19 Search App](https://github.com/liamca/covid19search). |
 | JFK demo | [AzureSearch JFK Files](https://github.com/Microsoft/AzureSearch_JFK_Files) | Learn more about the [JFK solution](https://www.microsoft.com/ai/ai-lab-jfk-files). |
 
 ## Other samples