fix(labs): update learner working-dir path to ~/ai-workflow-course after repo rename

The repo was renamed to ai-workflow-course, so the course's working-directory
convention should match. Replace ~/workflow-course (and /home/you/...,
/ABSOLUTE/PATH/TO/...) with ~/ai-workflow-course throughout modules/ and capstone/
(20 files, incl. the MCP config example). Safe replacement — already-correct
ai-workflow-course references are untouched.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TfzV5QvtPDz8LJS3Pu5VLT

modules/04-getting-the-ai-out-of-the-browser/README.md

@@ -131,7 +131,7 @@ a model/provider here, this is where the BYO-model choice from above gets made.
 whole point. The convention is **the current working directory is the project**:
 
 ```bash
-cd ~/workflow-course/tasks-app   # the repo from Modules 1–2
+cd ~/ai-workflow-course/tasks-app   # the repo from Modules 1–2
 your-agent                       # launch it from inside the project
 ```
 
@@ -279,7 +279,7 @@ copy-paste loop back in Module 1, now done right.
 
 1. Install the tool and authenticate it (steps 1–2 in "Wiring it up").
 
-2. Point it at the repo (step 3): `cd ~/workflow-course/tasks-app` and launch the agentic CLI from
+2. Point it at the repo (step 3): `cd ~/ai-workflow-course/tasks-app` and launch the agentic CLI from
    there, **or** open that folder in your editor and open the assistant's agent panel.
 
 3. **Confirm read access** (step 4). Ask: