Define the repository for Renovate

Autodiscovery leads to Renovate running on other repos, too

.github/workflows/renovate.yml

@@ -18,7 +18,6 @@ jobs:
           GITHUB_COM_TOKEN: ${{ secrets.renovate_github_com_token }}
           # See <https://docs.renovatebot.com/troubleshooting/#log-debug-levels>
           LOG_LEVEL: info # debug | info | warn | error | fatal
-          RENOVATE_AUTODISCOVER: 'true'
           RENOVATE_CONFIG_FILE: renovate.json
           RENOVATE_ENDPOINT: ${{ github.api_url }}
           RENOVATE_GIT_AUTHOR: Renovate Bot <mail+renovate@antville.org>
@@ -28,6 +27,8 @@ jobs:
           RENOVATE_LOG_FILE: renovate-log.ndjson
           RENOVATE_LOG_FILE_LEVEL: debug
           RENOVATE_PLATFORM: gitea
+          RENOVATE_REPOSITORIES:
+            - ${{ github.repository }}
           RENOVATE_REPOSITORY_CACHE: 'enabled'
           # github.token is not working here, it lacks some permissions required by Renovate
           RENOVATE_TOKEN: ${{ secrets.renovate_token }}