Fix language and license tag names (#1)

- Fix language and license tag names (e4594cf38827fb476b99ccbdec0760c5aff04e69)

README.md

@@ -1,21 +1,21 @@
 ---
 annotations_creators:
-  - crowdsourced
+- crowdsourced
 language_creators:
-  - found
-languages: []
-licenses:
-  - gpl-3.0-or-later
+- found
+language: []
+license:
+- gpl-3.0
 multilinguality: []
-pretty_name: GTSRB
 size_categories:
-  - 10K<n<100K
+- 10K<n<100K
 source_datasets:
-  - original
+- original
 task_categories:
-  - image-classification
+- image-classification
 task_ids:
-  - multi-label-image-classification
+- multi-label-image-classification
+pretty_name: GTSRB
 ---
 
 # Dataset Card for GTSRB