Update PartnerContributingGuide.md

Author: lindazqli

use-cases/agents/3p-tool/PartnerContributingGuide.md

@@ -5,7 +5,7 @@ This contributing guide is designed for partners who want to bring their APIs as
 
 ## Prepare your PR
 Your PR needs to create a new folder with the tool name and include the following information: 
-- `README.md` (required): follow this [template](./README_template_for_parter.d) as an example and this README file will serve as public documentation for help customers set up and use the tool with your API through Azure AI Agent service
+- `README.md` (required): follow this [template](./README_template_for_parter.md) as an example and this README file will serve as public documentation for help customers set up and use the tool with your API through Azure AI Agent service
   - The name, logo, and description in this README file will be used in the Azure AI Foundry Portal user experience and marketing materials.
   - It must include how customers set up an account with your API directly and your customer support contact or website.
   - Customers should be able to follow this README file and successfully use the tool with Azure AI Agent service.