Merge pull request #136 from chroma-core/fixEf

embed the string, not each character

Author: jeffchuber

docs/embeddings.md

@@ -41,7 +41,7 @@ default_ef = embedding_functions.DefaultEmbeddingFunction()
 :::tip
 Embedding functions can linked to a collection, which are used whenever you call `add`, `update`, `upsert` or `query`. You can also be use them directly which can be handy for debugging. 
 ```py
-val = default_ef("foo")
+val = default_ef(["foo"])
 ```
 -> [[0.05035809800028801, 0.0626462921500206, -0.061827320605516434...]]
 :::