Improvements to explanations and minor edits

week5/day3.ipynb

@@ -180,7 +180,13 @@
    "source": [
     "# Put the chunks of data into a Vector Store that associates a Vector Embedding with each chunk\n",
     "\n",
-    "embeddings = OpenAIEmbeddings()"
+    "embeddings = OpenAIEmbeddings()\n",
+    "\n",
+    "# If you would rather use the free Vector Embeddings from HuggingFace sentence-transformers\n",
+    "# Then replace embeddings = OpenAIEmbeddings()\n",
+    "# with:\n",
+    "# from langchain.embeddings import HuggingFaceEmbeddings\n",
+    "# embeddings = HuggingFaceEmbeddings(model_name=\"sentence-transformers/all-MiniLM-L6-v2\")"
    ]
   },
   {