Fix typo in authentication configuration instructions

Author: Thanusree-Microsoft

docs/DeploymentGuide.md

@@ -399,7 +399,7 @@ When creating your environment name, follow these rules:
         ```
 
 2. **Add Authentication Provider**  
-    - Follow steps in [App Authentication](./ConfigureAppAuthentication.md) to configure authenitcation in app service. Note that Authentication changes can take up to 10 minutes.  
+    - Follow steps in [App Authentication](./ConfigureAppAuthentication.md) to configure authentication in app service. Note that Authentication changes can take up to 10 minutes.  
 
 ## Deployment Success Validation
 
@@ -534,4 +534,4 @@ This will rebuild the source code, package it into a container, and push it to t
    - In the left-hand menu, select **Containers**.
    - Go to the **Environment Variables** tab.
    - Copy the necessary environment variable values and paste them into your local `.env` file.
-  
+