Use default token for v3 automation

Author: ReneWerner87

.github/workflows/v3-label-automation.yml

@@ -22,12 +22,12 @@ jobs:
       - name: Add item to v3 project
         uses: actions/add-to-project@v0.5.0
         with:
-          project-url: ${{ vars.V3_PROJECT_URL }}
-          github-token: ${{ secrets.PROJECT_V3_TOKEN }}
+          project-url: https://github.com/orgs/gofiber/projects/1
+          github-token: ${{ secrets.GITHUB_TOKEN }}
       - name: Assign v3 milestone
         uses: actions/github-script@v7
         with:
-          github-token: ${{ secrets.PROJECT_V3_TOKEN }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
             const core = require('@actions/core');
             const payload = context.eventName === 'issues' ? context.payload.issue : context.payload.pull_request;