Add MOT badge

This model qualifies as "Class I - Open Science Model" under the Model Openness Framework (MOF) from LF AI & Data.
This change adds the corresponding badge with a link to the related record in the Model Openness Tool (MOT).

README.md

@@ -11,6 +11,8 @@ datasets:
 library_name: gpt-neox
 ---
 
+[![mof-class1-qualified](https://mot.isitopen.ai/modules/mof/assets/badge_class1_qualified.png)](https://mot.isitopen.ai/model/1076)
+
 The *Pythia Scaling Suite* is a collection of models developed to facilitate 
 interpretability research [(see paper)](https://arxiv.org/pdf/2304.01373.pdf). 
 It contains two sets of eight models of sizes