Correct opnsense api endpoints - #413

at least one checked compositor testing entry; the checked checklist entry: The directory name matches the part of `id` after the `/` in `plugin.toml` exactly.; the checked checklist entry: It ships `plugin.toml`, `README.md`, `thumbnail.webp`, and `translations/en.json`.; the checked checklist entry: `README.md` follows the [README template](https://github.com/noctalia-dev/community-plugins/blob/main/README_TEMPLATE.md), documents every entry id and dependency, and includes exact panel IPC commands and launcher prefixes where applicable.; the checked checklist entry: I created `thumbnail.webp` with the [thumbnail generator](https://assets.noctalia.dev/plugins/thumbnail-generator.html).; the checked checklist entry: `version` follows semver and is bumped in this PR; `plugin_api` is the oldest API level this plugin requires.; the checked checklist entry: Every non-English translation in this PR uses a locale supported by Noctalia core, and I can read, write, and understand that language well enough to review and maintain it (no unreviewed machine/LLM translations).; the checked checklist entry: I did not edit `catalog.toml`; CI generates it.; the checked checklist entry: This PR touches exactly one plugin directory.