Unwanted deletion fixes (#3619)

* fixes too loose condition that cause to wipe out all generated responsive images if they are in the same output directory

* more elegant and inclusive fix to avoid wrong deletions

src/MediaCollections/Filesystem.php

@@ -242,7 +242,7 @@ public function removeResponsiveImages(Media $media, string $conversionName = 'm
 
         $responsiveImagePaths = array_filter(
             $allFilePaths,
-            fn (string $path) => Str::contains($path, $media->name) && Str::contains($path, $conversionName)
+            fn (string $path) => Str::contains($path, $media->name."___". $conversionName)
         );
 
         $this->filesystem->disk($media->disk)->delete($responsiveImagePaths);