Remove known issues about Azure Container Apps

Removed known issues section regarding environment variables and container configuration in Azure Container Apps, including affected scenarios, root cause, workarounds, and related CLI documentation.

Author: Shreyas-Microsoft

docs/DeploymentGuide.md

@@ -257,44 +257,3 @@ To help you get started, here's the [Sample Workflow](./SampleWorkflow.md) you c
    provisioned using `azd provision` or `azd up`, a `.env` file is automatically generated in the `.azure/<env-name>/.env`
    file. To get your `<env-name>` run `azd env list` to see which env is default.
 5. Ensure that `APP_ENV` is set to "**dev**" in your `.env` file.
-
-## Known Issues
-
-**Unable to update/add environment variables in Azure Container App**
-
-You may encounter issues when attempting to modify environment variables or container configuration in Azure Container Apps:
-
-**Affected Scenarios:**
-- **App Authentication Setup:** When adding authentication-related environment variables (CRUD operations on env variables)
-- **Container Configuration:** When trying to edit ACR name, image, or tag information for Container Apps
-
-**Root Cause:**
-This is an ongoing issue in Azure that affects the Azure Portal's ability to update Container Apps configurations.
-
-**Workaround - Use Azure CLI:**
-
-Until this issue is resolved, use Azure CLI commands to add or update environment variables and container configurations:
-
-**For Environment Variables:**
-```bash
-# Update environment variables
-az containerapp update \
-  --name <container-app-name> \
-  --resource-group <resource-group-name> \
-  --set-env-vars "KEY1=value1" "KEY2=value2"
-```
-
-**For Container Image Updates:**
-```bash
-# Update container image
-az containerapp update \
-  --name <container-app-name> \
-  --resource-group <resource-group-name> \
-  --image <registry>/<image>:<tag>
-```
-
-📖 **Detailed CLI Documentation:**
-- [Manage environment variables](https://learn.microsoft.com/en-us/azure/container-apps/environment-variables?tabs=cli)
-- [Manage revisions](https://learn.microsoft.com/en-us/azure/container-apps/revisions-manage?tabs=bash)
-
-> **Note:** This is a temporary workaround. The documentation will be updated once the Azure Portal issue is resolved.