📝 Add license for icons

Author: AnandChowdhary

README.md

@@ -45,3 +45,6 @@ This is a real-time screenshot of the above RescueTime weekly overview URL:
 ## 📄 License
 
 Code: [MIT](./LICENSE) © [Anand Chowdhary](https://anandchowdhary.com)
+Icons:
+  - Loader: [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/) © [Rohith M S](https://thenounproject.com/rohithdezinr)
+  - Error: [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/) © [Roselin Christina](https://thenounproject.com/rosttarose)