Update README.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: goloroden

README.md

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 The official PHP client SDK for [EventSourcingDB](https://www.eventsourcingdb.io) – a purpose-built database for event sourcing.
 
-EventSourcingDB enables you to build and operate event-driven applications with native support for writing, reading, and observing events. This client SDK provides convenient access to its capabilities in Go.
+EventSourcingDB enables you to build and operate event-driven applications with native support for writing, reading, and observing events. This client SDK provides convenient access to its capabilities in PHP.
 
 For more information on EventSourcingDB, see its [official documentation](https://docs.eventsourcingdb.io/).