fix: use interaction fork action again (#3777)

Author: trueberryless

.github/workflows/welcome-bot.yml

@@ -13,10 +13,10 @@ jobs:
     name: Welcome First-Time Contributors
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/first-interaction@1c4688942c71f71d4f5502a26ea67c331730fa4d # v3.1.0
+      - uses: zephyrproject-rtos/action-first-interaction@58853996b1ac504b8e0f6964301f369d2bb22e5c
         with:
-          repo_token: ${{ secrets.FREDKBOT_GITHUB_TOKEN }}
-          pr_message: |
+          repo-token: ${{ secrets.FREDKBOT_GITHUB_TOKEN }}
+          pr-opened-message: |
             Hello! Thank you for opening your **first PR** to Starlight! ✨
 
             Here’s what will happen next: