Add Copyright statement

README.md

@@ -47,3 +47,8 @@ Example:
 # Disclaimer
 
 This dataset may contain publicly available images or text data. All data is provided for research and educational purposes only. If you are the rights holder of any content and have concerns regarding intellectual property or copyright, please contact us at "support-data (at) jina.ai" for removal. We do not collect or process personal, sensitive, or private information intentionally. If you believe this dataset includes such content (e.g., portraits, location-linked images, medical or financial data, or NSFW content), please notify us, and we will take appropriate action.
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+# Copyright
+
+All rights are reserved to the original authors of the documents.