Add from_model2vec/from_distillation to docs (#2978)

Author: tomaarsen

docs/package_reference/sentence_transformer/models.md

@@ -16,6 +16,7 @@
 .. autoclass:: sentence_transformers.models.LSTM
 .. autoclass:: sentence_transformers.models.Normalize
 .. autoclass:: sentence_transformers.models.StaticEmbedding
+    :members: from_model2vec, from_distillation
 .. autoclass:: sentence_transformers.models.WeightedLayerPooling
 .. autoclass:: sentence_transformers.models.WordEmbeddings
 .. autoclass:: sentence_transformers.models.WordWeights