assignments: update urls to use main repo path

Co-authored-by: Ona <no-reply@ona.com>

Author: Siddhant-K-code

src/content/chapters/04-context-windows.mdx

@@ -172,8 +172,8 @@ import Assignment from "../../components/Assignment.astro";
   chapter={4}
   title="Make the context window visible"
   starterFile="ch04-context-windows/starter.py"
-  onaUrl="https://app.gitpod.io/#https://github.com/Siddhant-K-code/agentic-engineering-assignments/tree/main/ch04-context-windows"
-  localUrl="https://github.com/Siddhant-K-code/agentic-engineering-assignments/raw/main/ch04-context-windows/starter.py"
+  onaUrl="https://app.gitpod.io/#https://github.com/Siddhant-K-code/agentic-engineering-guide/tree/main/assignments/ch04-context-windows"
+  localUrl="https://github.com/Siddhant-K-code/agentic-engineering-guide/raw/main/assignments/ch04-context-windows/starter.py"
 >
 
 Run the starter. It builds a multi-turn conversation and prints the full `messages` array after each turn with a running token count. Then add a 4th turn that asks the model to recall something specific from turn 1. Watch whether it does.

src/content/chapters/09-prompt-injection.mdx

@@ -216,8 +216,8 @@ import Assignment from "../../components/Assignment.astro";
   chapter={9}
   title="Inject, observe, defend"
   starterFile="ch09-prompt-injection/starter.py"
-  onaUrl="https://app.gitpod.io/#https://github.com/Siddhant-K-code/agentic-engineering-assignments/tree/main/ch09-prompt-injection"
-  localUrl="https://github.com/Siddhant-K-code/agentic-engineering-assignments/raw/main/ch09-prompt-injection/starter.py"
+  onaUrl="https://app.gitpod.io/#https://github.com/Siddhant-K-code/agentic-engineering-guide/tree/main/assignments/ch09-prompt-injection"
+  localUrl="https://github.com/Siddhant-K-code/agentic-engineering-guide/raw/main/assignments/ch09-prompt-injection/starter.py"
 >
 
 The starter runs an agent that reads a support ticket and drafts a reply. Two fixture tickets are included: one with a direct injection, one with a subtle indirect injection. Run both. Then strengthen the system prompt and run again.

src/content/chapters/17-agent-loop.mdx

@@ -197,8 +197,8 @@ import Assignment from "../../components/Assignment.astro";
   chapter={17}
   title="Build a bare-metal agent loop"
   starterFile="ch17-agent-loop/starter.py"
-  onaUrl="https://app.gitpod.io/#https://github.com/Siddhant-K-code/agentic-engineering-assignments/tree/main/ch17-agent-loop"
-  localUrl="https://github.com/Siddhant-K-code/agentic-engineering-assignments/raw/main/ch17-agent-loop/starter.py"
+  onaUrl="https://app.gitpod.io/#https://github.com/Siddhant-K-code/agentic-engineering-guide/tree/main/assignments/ch17-agent-loop"
+  localUrl="https://github.com/Siddhant-K-code/agentic-engineering-guide/raw/main/assignments/ch17-agent-loop/starter.py"
 >
 
 No framework. The starter implements a raw loop and prints state at each iteration: `iteration N | tokens: X | decision: [tool_call | final_answer]`. Task: find all Python files in `fixtures/` that import `os`. Watch the loop. Count iterations.