Migrate user-attachments image to local repository and update start-exercise version

Co-authored-by: FidelusAleksander <63016446+FidelusAleksander@users.noreply.github.com>

Author: Copilot

.github/images/add-a-suggestion-button.png

@@ -20,7 +20,7 @@ The **Add a suggestion** feature is a button in the comment text editor. It inse
 
 1. Click the **Add a suggestion** button to insert a modifiable copy of the line.
 
-   <img width="300" alt="add-a-suggestion-button" src="https://github.com/user-attachments/assets/dc781d29-d5fe-4da9-9e4b-eb406c5d9ab5" />
+   <img width="300" alt="add-a-suggestion-button" src="../images/add-a-suggestion-button.png" />
 
 1. Edit the suggestion to match below and click the **Add a single comment** button.
 

.github/steps/4-step.md

@@ -18,7 +18,7 @@ jobs:
     if: |
       !github.event.repository.is_template
     name: Start Exercise
-    uses: skills/exercise-toolkit/.github/workflows/start-exercise.yml@v0.5.0
+    uses: skills/exercise-toolkit/.github/workflows/start-exercise.yml@v0.8.0
     with:
       exercise-title: "Review Pull Requests"
       intro-message: "Let's learn to collaborate with others using pull requests."