Fix UriInterface username related methods naming convention

Author: nyamsprod

Uri.php

@@ -1550,7 +1550,7 @@ public function withUserInfo(
         };
     }
 
-    public function withUser(Stringable|string|null $user): UriInterface
+    public function withUsername(Stringable|string|null $user): UriInterface
     {
         return $this->withUserInfo($user, $this->pass);
     }

UriTest.php

@@ -1089,8 +1089,8 @@ public function it_will_fail_to_generate_an_anchor_tag_html_for_the_instance():
     #[Test]
     public function it_can_update_the_user_component(): void
     {
-        self::assertSame('user', Uri::new('example://host/path?query')->withUser('user')->getUsername());
-        self::assertNull(Uri::new('example://user@host/path?query')->withUser(null)->getUsername());
+        self::assertSame('user', Uri::new('example://host/path?query')->withUsername('user')->getUsername());
+        self::assertNull(Uri::new('example://user@host/path?query')->withUsername(null)->getUsername());
     }
 
     #[Test]