chore: update article link

Author: euonymos

README.md

@@ -15,7 +15,7 @@ resulting in free implementations for:
 
 * [Getting Started Guide](https://github.com/mlabs-haskell/cem-script/blob/master/docs/getting_started.md)
 * [Goals and Design](https://github.com/mlabs-haskell/cem-script/blob/master/docs/goals_and_design.md)
-* Article on [testing with CLB](TODO: link) is another introduction to testing CEM Script dApps.
+* Article about [testing dApps on Cardano with CLB](https://www.mlabs.city/blog/testing-dapps-on-cardano-with-clb-emulator) is another introduction to testing CEM Script dApps.
 
 ## Building