docs: update link to technical documentation

docs/strategy-customization.md

@@ -158,7 +158,7 @@ Out of the box, freqtrade installs the following technical libraries:
 
 - [ta-lib](https://ta-lib.github.io/ta-lib-python/)
 - [pandas-ta](https://twopirllc.github.io/pandas-ta/)
-- [technical](https://github.com/freqtrade/technical/)
+- [technical](https://technical.freqtrade.io)
 
 Additional technical libraries can be installed as necessary, or custom indicators may be written / invented by the strategy author.