ci: fix reference to personal access token

Turns out, github.token is not a PAT
https://github.com/actions/add-to-project/issues/462#issuecomment-1712561302

.github/workflows/auto-add-to-project.yml

@@ -8,8 +8,8 @@ on:
     types:
       - opened
 
-
 jobs:
+  # https://github.com/actions/add-to-project
   add-to-project:
     name: Add issue and bugs to project
     runs-on: ubuntu-latest
@@ -17,4 +17,4 @@ jobs:
       - uses: actions/add-to-project@v0.5.0
         with:
           project-url: https://github.com/orgs/overhangio/projects/4
-          github-token: ${{ github.token }}
+          github-token: ${{ secrets.GH_PROJECT_PERSONAL_ACCESS_TOKEN }}