Update tasks doc and fix Robot test keyword

- Remove completed Task 1 from Docs/tasks.md
- Fix download.robot: use Get JSON Value instead of deprecated Get Value From Json
- Minor whitespace cleanup

Docs/tasks.md

@@ -1,19 +1,3 @@
-## Task 1: API Config - Update Config
-
-**Suite:** `Robot.Api.Config`  
-**Test:** `Update Config`  
-**Result:** FAIL  
-**Error:** `Url: http://127.0.0.1:8765/api/config Expected status: 422 != 200`
-
-**Instructions:**
-- Investigate the `PUT /api/config` endpoint in the FastAPI application.
-- The test sends a valid config update but receives HTTP 422 (Unprocessable Entity) instead of 200.
-- Check the Pydantic model used for config updates — a field may be missing, have the wrong type, or have an unexpected validator.
-- Compare the test payload in `tests/robot/api/config.robot` with the request model in the backend.
-- Fix either the API endpoint validation or the test payload so the update succeeds.
-
----
-
 ## Task 2: API Download - Remove Item From Queue
 
 **Suite:** `Robot.Api.Download`  
@@ -421,5 +405,4 @@
 **Instructions:**
 - Same root cause as Task 22: the setup form is not visible.
 - Fix the suite setup so the app is in an unconfigured state before each setup flow test.
-- Ensure `#setup-form` is rendered when navigating to the setup page.
-
+- Ensure `#setup-form` is rendered when navigating to the setup page.