Fix documentation card of covid_qa_castorini dataset (#4877)

Commit from https://github.com/huggingface/datasets/commit/7d63124d75fa7759ebafba1d8d24eb542b769949

README.md

@@ -51,7 +51,7 @@ pretty_name: CovidQaCastorini
 
 ## Dataset Description
 
-- **Homepage:** https://covidqa.ai
+- **Homepage:** http://covidqa.ai
 - **Repository:** https://github.com/castorini/pygaggle
 - **Paper:** https://arxiv.org/abs/2004.11339
 - **Point of Contact:** [Castorini research group @UWaterloo](https://github.com/castorini/)
@@ -159,10 +159,9 @@ The listed authors in the homepage are maintaining/supporting the dataset.
 
 [More Information Needed]
 
-The covidqa dataset is licensed under 
-the [Apache License 2.0](https://github.com/castorini/pygaggle/blob/master/LICENSE)
+### Licensing Information
 
-[More Information Needed]
+The dataset is licensed under the [Apache License 2.0](https://github.com/castorini/pygaggle/blob/master/LICENSE).
 
 ### Citation Information