update demo link for searx

- fixes https://github.com/awesome-selfhosted/awesome-selfhosted/issues/2980
- use the public list of searx instances as demo link

README.md

@@ -1570,7 +1570,7 @@ _Related: [Booking and Scheduling](#booking-and-scheduling)_
 - [librengine](https://github.com/liameno/librengine) - Private web search engine. `GPL-3.0` `C++`
 - [Jina](https://github.com/jina-ai/jina/) - Cloud-native neural search framework for any kind of data. `Apache-2.0` `Python`
 - [MeiliSearch](https://meilisearch.com) - Ultra relevant, instant and typo-tolerant full-text search API. ([Source Code](https://github.com/meilisearch/MeiliSearch)) `MIT` `Rust`
-- [Searx](https://searx.github.io/searx/) - Privacy-respecting, hackable metasearch engine. ([Demo](https://searx.me/), [Source Code](https://github.com/searx/searx)) `AGPL-3.0` `Python`
+- [Searx](https://searx.github.io/searx/) - Privacy-respecting, hackable metasearch engine. ([Demo](https://searx.space/), [Source Code](https://github.com/searx/searx)) `AGPL-3.0` `Python`
 - [sist2](https://github.com/simon987/sist2) - Lightning-fast file system indexer and search tool. ([Demo](https://sist2.simon987.net/)) `GPL-3.0` `C`
 - [Typesense](https://typesense.org) - Blazing fast, typo-tolerant open source search engine optimized for developer happiness and ease of use. ([Source Code](https://github.com/typesense/typesense)) `GPL-3.0` `C++`
 - [Whoogle](https://github.com/benbusby/whoogle-search) `⚠` - A self-hosted, ad-free, privacy-respecting metasearch engine. `MIT` `Python`