Again fix more Psalm errors

Author: sveldhuisen

src/GrantType/AuthorizationCodeGrantType.php

@@ -9,6 +9,7 @@
 
 /**
  * Implementation of the OAuth authorization grant type.
+ * @psalm-api
  */
 final class AuthorizationCodeGrantType implements RefreshableGrantTypeInterface
 {

src/GrantType/ClientCredentialsGrantType.php

@@ -9,6 +9,7 @@
 
 /**
  * Implementation of the OAuth client credentials grant type.
+ * @psalm-api
  */
 final class ClientCredentialsGrantType implements GrantTypeInterface
 {

src/GrantType/PasswordGrantType.php

@@ -9,6 +9,7 @@
 
 /**
  * Implementation of the OAuth password grant type.
+ * @psalm-api
  */
 final class PasswordGrantType implements GrantTypeInterface
 {

src/RequestSigner/HeaderRequestSigner.php

@@ -16,6 +16,7 @@ public function __construct(string $headerName, string $headerValueFormat)
         $this->headerValueFormat = $headerValueFormat;
     }
 
+    #[\Override]
     public function modify(array &$options, string $token): void
     {
         if (!array_key_exists('headers', $options)) {