chore(doc): Update 03-database.md

Fix a typo on the `DATABASE` word

Author: happytodev

src/Web/Documentation/content/1.x/1-essentials/03-database.md

@@ -28,11 +28,11 @@ use Tempest\Database\Config\PostgresConfig;
 use function Tempest\env;
 
 return new PostgresConfig(
-    host: env('DATBASE_HOST', default: '127.0.0.1'),
-    port: env('DATBASE_PORT', default: '5432'),
-    username: env('DATBASE_USERNAME', default: 'postgres'),
-    password: env('DATBASE_PASSWORD', default: 'postgres'),
-    database: env('DATBASE_DATABASE', default: 'postgres'),
+    host: env('DATABASE_HOST', default: '127.0.0.1'),
+    port: env('DATABASE_PORT', default: '5432'),
+    username: env('DATABASE_USERNAME', default: 'postgres'),
+    password: env('DATABASE_PASSWORD', default: 'postgres'),
+    database: env('DATABASE_DATABASE', default: 'postgres'),
 );
 ```