Found docs updates needed from ADK python release v2.6.1 to v2.6.2

Compare link: https://github.com/google/adk-python/compare/v2.6.1...v2.6.2

### 1. **Update Cloud Run prerequisites to mention gcloud beta components**

**Doc file**: docs/deploy/cloud-run.md

**Current state**:
> 1. You should have a Google Cloud project. You need to know your:
> 1. Project name (i.e. "my-project")
> 1. Project location (i.e. "us-central1")
> 1. Service account (i.e. "1234567890-compute@developer.gserviceaccount.com")
> 1. GOOGLE_API_KEY

**Proposed Change**:
> 1. You should have a Google Cloud project. You need to know your:
> 1. Project name (i.e. "my-project")
> 1. Project location (i.e. "us-central1")
> 1. Service account (i.e. "1234567890-compute@developer.gserviceaccount.com")
> 1. GOOGLE_API_KEY
> 2. The Google Cloud CLI (`gcloud`) must be installed. If deploying via the ADK CLI, the `gcloud beta` components are required (install with `gcloud components install beta`).

**Reasoning**:
The `adk deploy cloud_run` command was updated to use `gcloud beta run deploy` under the hood. Users need to be informed that the `beta` components are required to successfully run the CLI deployment command.

**Reference**: src/google/adk/cli/cli_deploy.py

Update docs/deploy/cloud-run.md, using the referenced src/google/adk/cli/cli_deploy.py entry point to confirm the deployment command's gcloud beta requirement. Add the prerequisite for installing gcloud and its beta components, then verify the documented command and installation instruction match the current deployment flow.

Written by the indexing model from the issue text.