Update README to remove plaintext password storage info

Removed information about plaintext password storage prompt.

Author: Maxteabag

README.md

@@ -196,8 +196,6 @@ Connections and settings are stored in `~/.sqlit/`.
 
 Connection details are stored in `~/.sqlit/connections.json`, but passwords are stored in your OS keyring when available (macOS Keychain, Windows Credential Locker, Linux Secret Service).
 
-If a keyring backend isn't available, `sqlit` will ask whether to store passwords as plaintext in `~/.sqlit/` (protected permissions). If you decline, you'll be prompted when needed.
-
 ### How does sqlit compare to Harlequin, Lazysql, etc.?
 
 sqlit is inspired by [lazygit](https://github.com/jesseduffield/lazygit) - you can just jump in and there's no need for external documentation. The keybindings are shown at the bottom of the screen and the UI is designed to be intuitive without memorizing shortcuts.