Add learning-at-home repos to requirements.txt

requirements.txt

@@ -1,3 +1,5 @@
+git+git://github.com/learning-at-home/hivemind
+git+git://github.com/learning-at-home/dalle-pytorch@weight-sharing
 transformers>=4.9.2
 tokenizers>=0.10.2
 datasets>=1.11.0