adding the changes as per billy's review

Signed-off-by: Shubham Singh <shubhammahar1306@gmail.com>

cmd/oras/internal/option/packer.go

@@ -100,8 +100,9 @@ func (opts *Packer) LoadManifestAnnotations() (annotations map[string]map[string
 	if opts.AnnotationFilePath != "" {
 		if err = decodeJSON(opts.AnnotationFilePath, &annotations); err != nil {
 			return nil, fmt.Errorf("error loading manifest annotations from file %s: %w, 
-				Refer to the document at https://oras.land/docs/how_to_guides/manifest_annotations ", opts.AnnotationFilePath, err)
+			refer to the document at https://oras.land/docs/how_to_guides/manifest_annotations", opts.AnnotationFilePath, err)
 		}
+
 	}
 	if len(opts.ManifestAnnotations) != 0 {
 		annotations = make(map[string]map[string]string)