Update README.md

Author: robmarkcole

README.md

@@ -48,7 +48,8 @@ This document lists resources for performing deep learning on satellite imagery.
   * [Image Captioning & Visual Question Answering](https://github.com/robmarkcole/satellite-image-deep-learning#image-captioning--visual-question-answering)
   * [Mixed data learning](https://github.com/robmarkcole/satellite-image-deep-learning#mixed-data-learning)
   * [Few/one/zero/low shot learning](https://github.com/robmarkcole/satellite-image-deep-learning#fewonezerolow-shot-learning)
-  * [Self-supervised, weakly/semi-supervised, unsupervised & contrastive learning](https://github.com/robmarkcole/satellite-image-deep-learning#self-supervised-weaklysemi-supervised-unsupervised--contrastive-learning)
+  * [Self/un-supervised & contrastive learning](https://github.com/robmarkcole/satellite-image-deep-learning#selfun-supervised--contrastive-learning)
+  * [Weakly/semi-supervised](https://github.com/robmarkcole/satellite-image-deep-learning#weaklysemi-supervised)
   * [Active learning](https://github.com/robmarkcole/satellite-image-deep-learning#active-learning)
   * [Federated learning](https://github.com/robmarkcole/satellite-image-deep-learning#federated-learning)
   * [Image registration](https://github.com/robmarkcole/satellite-image-deep-learning#image-registration)