Add link to github.com/KoNekoD/pgx-colon-query-rewriter

Author: jackc

README.md

@@ -185,3 +185,7 @@ Simple Golang implementation for transactional outbox pattern for PostgreSQL usi
 ### [https://github.com/Arlandaren/pgxWrappy](https://github.com/Arlandaren/pgxWrappy)
 
 Simplifies working with the pgx library, providing convenient scanning of nested structures.
+
+## [https://github.com/KoNekoD/pgx-colon-query-rewriter](https://github.com/KoNekoD/pgx-colon-query-rewriter)
+
+Implementation of the pgx query rewriter to use ':' instead of '@' in named query parameters.