Fixed issue where the parameter name in the javadoc did not match the parameter name in the `asFiles(Iterable<File>)` method.
Fixed issue where the parameter name in the javadoc did not match the parameter name in the `asFiles(Iterable<File>)` method.

ymero/thumbnailator,giflw/thumbnailator,coobird/thumbnailator,qingsong-xu/thumbnailator,guhb/thumbnailator