Replace wiki link

README.md

@@ -61,5 +61,5 @@ limitations under the License.
 [contributing-image]: https://d3i6fms1cm1j0i.cloudfront.net/github/images/contributing.png
 [techdocs]: https://docs.snowplow.io/docs/collecting-data/collecting-from-own-applications/golang-tracker/
 
-[tracker-classification]: https://github.com/snowplow/snowplow/wiki/Tracker-Maintenance-Classification
+[tracker-classification]: https://docs.snowplowanalytics.com/docs/collecting-data/collecting-from-own-applications/tracker-maintenance-classification/
 [actively-maintained]: https://img.shields.io/static/v1?style=flat&label=Snowplow&message=Actively%20Maintained&color=6638b8&labelColor=9ba0aa&logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAeFBMVEVMaXGXANeYANeXANZbAJmXANeUANSQAM+XANeMAMpaAJhZAJeZANiXANaXANaOAM2WANVnAKWXANZ9ALtmAKVaAJmXANZaAJlXAJZdAJxaAJlZAJdbAJlbAJmQAM+UANKZANhhAJ+EAL+BAL9oAKZnAKVjAKF1ALNBd8J1AAAAKHRSTlMAa1hWXyteBTQJIEwRgUh2JjJon21wcBgNfmc+JlOBQjwezWF2l5dXzkW3/wAAAHpJREFUeNokhQOCA1EAxTL85hi7dXv/E5YPCYBq5DeN4pcqV1XbtW/xTVMIMAZE0cBHEaZhBmIQwCFofeprPUHqjmD/+7peztd62dWQRkvrQayXkn01f/gWp2CrxfjY7rcZ5V7DEMDQgmEozFpZqLUYDsNwOqbnMLwPAJEwCopZxKttAAAAAElFTkSuQmCC