unit 3 notebook typo fix

Author: alocaputo

unit3/01_stable_diffusion_introduction.ipynb

@@ -477,7 +477,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "These text embeddings (the so-called 'hidden states' of the last transformer block in the text encoder model) will be fed to the UNet as an additional arument to the `forward` method, which we'll see in the next section."
+    "These text embeddings (the so-called 'hidden states' of the last transformer block in the text encoder model) will be fed to the UNet as an additional argument to the `forward` method, which we'll see in the next section."
    ]
   },
   {