fix: trailing slash on endpoint, drop explicit token from config.js

Renovate reads RENOVATE_TOKEN from env automatically.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

renovate/configmap-renovate.yaml

@@ -7,8 +7,7 @@ data:
   config.js: |
     module.exports = {
       platform: 'gitea',
-      endpoint: 'https://git.chemavx.xyz',
+      endpoint: 'https://git.chemavx.xyz/',
-      token: process.env.RENOVATE_TOKEN,
       repositories: [
         'chemavx/researchowl',
         'chemavx/polymarket-bot',