Update README.md

Fixed 'Bitwarden clients' link, it should lead to https://bitwarden.com/download/ and not to https://bitwarden.com/#download/

README.md

-### Alternative implementation of the Bitwarden server API written in Rust and compatible with [upstream Bitwarden clients](https://bitwarden.com/#download)*, perfect for self-hosted deployment where running the official resource-heavy service might not be ideal.
+### Alternative implementation of the Bitwarden server API written in Rust and compatible with [upstream Bitwarden clients](https://bitwarden.com/download/)*, perfect for self-hosted deployment where running the official resource-heavy service might not be ideal.
 
 📢 Note: This project was known as Bitwarden_RS and has been renamed to separate itself from the official Bitwarden server in the hopes of avoiding confusion and trademark/branding issues. Please see [#1642](https://github.com/dani-garcia/vaultwarden/discussions/1642) for more explanation.