Merge pull request #2503 from ColeBurch/pgx-govalues-decimal

Add link to github.com/ColeBurch/pgx-govalues-decimal.

Author: jackc

README.md

@@ -120,6 +120,7 @@ pgerrcode contains constants for the PostgreSQL error codes.
 
 * [github.com/jackc/pgx-gofrs-uuid](https://github.com/jackc/pgx-gofrs-uuid)
 * [github.com/jackc/pgx-shopspring-decimal](https://github.com/jackc/pgx-shopspring-decimal)
+* [github.com/ColeBurch/pgx-govalues-decimal](https://github.com/ColeBurch/pgx-govalues-decimal)
 * [github.com/twpayne/pgx-geos](https://github.com/twpayne/pgx-geos) ([PostGIS](https://postgis.net/) and [GEOS](https://libgeos.org/) via [go-geos](https://github.com/twpayne/go-geos))
 * [github.com/vgarvardt/pgx-google-uuid](https://github.com/vgarvardt/pgx-google-uuid)