Corrected readme

The readme claims this model is open source, but the attached license clearly contradicts the [open source definition](https://opensource.org/osd/). I'm assuming that this is a mistake, though it's one that's important to correct promptly before people use the model in violation of the actual license.

Note that I'm assuming that the license is authoritative, but an alternative solution would be to change the license to an open source license such as Apache 2.0.

README.md

@@ -14,7 +14,7 @@ Orca 2 is a helpful assistant that is built for research purposes only and provi
 in tasks such as reasoning over user given data, reading comprehension, math problem solving and text summarization.
 The model is designed to excel particularly in reasoning.
 
-We open-source Orca 2 to encourage further research on the development, evaluation, and alignment of smaller LMs.
+We publicly release Orca 2 to encourage further research on the development, evaluation, and alignment of smaller LMs.
 
 ## What is Orca 2’s intended use(s)?