MOD: Update docs links to new canonical URL

Author: threecgreen

README.md

@@ -157,7 +157,7 @@ These examples can be compiled by enabling the cmake option `DATABENTO_ENABLE_EX
 
 ## Documentation
 
-You can find more detailed examples and the full API documentation on the [Databento doc site](https://docs.databento.com/getting-started?historical=cpp&live=cpp).
+You can find more detailed examples and the full API documentation on the [Databento doc site](https://databento.com/docs/getting-started?historical=cpp&live=cpp).
 
 ## License