Updated name to PgSql [skip ci]

Author: ankane

README.md

@@ -2,14 +2,16 @@
 
 [pgvector](https://github.com/pgvector/pgvector) support for PHP
 
+Supports [Laravel](https://github.com/laravel/laravel) and [PgSql](https://www.php.net/manual/en/book.pgsql.php)
+
 [![Build Status](https://github.com/pgvector/pgvector-php/actions/workflows/build.yml/badge.svg)](https://github.com/pgvector/pgvector-php/actions)
 
 ## Getting Started
 
 Follow the instructions for your database library:
 
 - [Laravel](#laravel)
-- [PHP](#php)
+- [PgSql](#pgsql)
 
 Or check out some examples:
 
@@ -106,7 +108,7 @@ public function down()
 
 Use `vector_ip_ops` for inner product and `vector_cosine_ops` for cosine distance
 
-### PHP
+### PgSql
 
 Enable the extension
 

tests/PhpTest.php tests/PgSqlTest.phptests/PhpTest.php renamed to tests/PgSqlTest.php

@@ -6,7 +6,7 @@
 use Pgvector\SparseVector;
 use Pgvector\Vector;
 
-final class PhpTest extends TestCase
+final class PgSqlTest extends TestCase
 {
     public function testWorks()
     {