fix: use the real amount argument in blur instead of duplicating strength

Author: Baspa

src/Transformations/Blur.php

@@ -20,7 +20,7 @@ public static function transform(...$args): array
 
         return [
             self::STRENGTH => $strength,
-            self::AMOUNT => $strength,
+            self::AMOUNT => $amount,
         ];
     }
 

tests/TransformationTest.php

@@ -198,3 +198,7 @@
     $url = (string) $transformation->stripMeta('sensitive');
     expect($url)->toBe('https://ucarecdn.com/12a3456b-c789-1234-1de2-3cfa83096e25/-/strip_meta/sensitive/');
 });
+
+it('uses the correct amount argument in blur', function () {
+    expect((string) uploadcare('12a3456b-c789-1234-1de2-3cfa83096e25')->blur(10, 5))->toContain('-/blur/10/5/');
+});