Update README.md

Fixed the reference to the feature table to point to the new GitBook instead of the old GitBook (which was in edit mode?)

README.md

@@ -77,7 +77,7 @@ Usage (computing 24 features: _catch24_ = _catch22_ + mean + standard deviation)
 pycatch22.catch22_all(tsData,catch24=True)
 ```
 
-We also include a 'short name' for each feature for easier reference (as outlined in the GitBook [Feature overview table](https://app.gitbook.com/o/-MfehZqaCWnsSRDIdUG8/s/-MfHFY4lvzOz3IPaA3wm/feature-overview-table)).
+We also include a 'short name' for each feature for easier reference (as outlined in the GitBook [Feature overview table](https://time-series-features.gitbook.io/catch22/feature-descriptions/feature-overview-table)).
 These short names can be included in the output from `catch22_all()` by setting `short_names=True` as follows:
 
 ```python3