Changing name from "Open-source" to "Open-science"

RAIL license is open-source-like; perhaps open-science is a better term.
Discussion here: https://huggingface.slack.com/archives/C020B9V3L1K/p1653410195001429

README.md

@@ -51,7 +51,7 @@ language:
 - zu
 ---
 
-# <p>BLOOM LM<br/> _BigScience Large Open-source Open-access Multilingual Language Model_ <br/>Model Card</p>
+# <p>BLOOM LM<br/> _BigScience Large Open-science Open-access Multilingual Language Model_ <br/>Model Card</p>
 <img src="https://assets.website-files.com/6139f3cdcbbff3a68486761d/613cd8997b270da063e230c5_Tekengebied%201-p-500.png" alt="BigScience Logo" width="200"/>