Fix linter issues

Author: SerafimArts

src/Exception/Definition/Template/TemplateArgumentException.php

@@ -29,6 +29,9 @@ public function __construct(
         parent::__construct($type, $template, $code, $previous);
     }
 
+    /**
+     * @return int<0, max>
+     */
     private function getArgumentIndex(NamedTypeNode $type, TemplateArgumentNode $argument): int
     {
         $index = $type->arguments?->findIndex($argument);

src/Type/Builder/DateTimeTypeBuilder.php

@@ -31,7 +31,7 @@ public function build(
         TypeParserInterface $parser,
     ): TypeInterface {
         $this->expectNoShapeFields($statement);
-        $this->expectTemplateArgumentsLessOrEqualThan($statement, 1, 0);
+        $this->expectTemplateArgumentsLessOrEqualThan($statement, 1);
 
         /** @var class-string<\DateTimeInterface> $class */
         $class = $statement->name->toString();