Update README.md (#923)

* Update README.md

changed it to ` is a source-available`

* Update README.md

Author: Rajakavitha1

docs-gb/README.md

@@ -2,10 +2,7 @@
 
 # Alibi Detect
 
-[Alibi Detect](https://github.com/SeldonIO/alibi-detect) is an open source Python library 
-focused on **outlier**, **adversarial** and **drift** detection. The package aims to cover 
-both online and offline detectors for tabular data, text, images and time series. Both 
-**TensorFlow** and **PyTorch** backends are supported for drift detection.
+[Alibi Detect](https://github.com/SeldonIO/alibi-detect) is a source-available Python library focused on **outlier**, **adversarial** and **drift** detection. The package aims to cover both online and offline detectors for tabular data, text, images and time series. Both **TensorFlow** and **PyTorch** backends are supported for drift detection.
 
 For more background on the importance of monitoring outliers and distributions in a production setting, check out 
 [this talk](https://slideslive.com/38931758/monitoring-and-explainability-of-models-in-production?ref=speaker-37384-latest) 
@@ -16,4 +13,4 @@ For a thorough introduction to drift detection, check out the talk below titled,
 The talk covers what drift is and why it pays to detect it, the different types of drift, how it 
 can be detected in a principled manner and also describes the anatomy of a drift detector.
 
-{% embed url="https://youtu.be/tL5sEaQha5o" %}
+{% embed url="https://youtu.be/tL5sEaQha5o" %}