Add missing pip package llama-index-embeddings-huggingface-api

Fix the following import error occurring at step 6 (`IngestionPipeline` relying on `HuggingFaceInferenceAPIEmbedding`)

```
---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
Cell In[6], line 1
----> 1 from llama_index.embeddings.huggingface_api import HuggingFaceInferenceAPIEmbedding
2 from llama_index.core.node_parser import SentenceSplitter
3 from llama_index.core.ingestion import IngestionPipeline

ModuleNotFoundError: No module named 'llama_index.embeddings.huggingface_api'
```

unit2/llama-index/components.ipynb

@@ -23,7 +23,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "!pip install llama-index datasets llama-index-callbacks-arize-phoenix llama-index-vector-stores-chroma llama-index-llms-huggingface-api -U -q"
+    "!pip install llama-index datasets llama-index-callbacks-arize-phoenix llama-index-vector-stores-chroma llama-index-llms-huggingface-api llama-index-embeddings-huggingface-api -U -q"
    ]
   },
   {