docs: Fix typo

Author: HanzTantiangco

autoencoder/denoising-autoencoder/Denoising_Autoencoder_Exercise.ipynb

@@ -98,7 +98,7 @@
     "---\n",
     "# Denoising\n",
     "\n",
-    "As I've mentioned before, autoencoders like the ones you've built so far aren't too useful in practive. However, they can be used to denoise images quite successfully just by training the network on noisy images. We can create the noisy images ourselves by adding Gaussian noise to the training images, then clipping the values to be between 0 and 1.\n",
+    "As I've mentioned before, autoencoders like the ones you've built so far aren't too useful in practice. However, they can be used to denoise images quite successfully just by training the network on noisy images. We can create the noisy images ourselves by adding Gaussian noise to the training images, then clipping the values to be between 0 and 1.\n",
     "\n",
     ">**We'll use noisy images as input and the original, clean images as targets.** \n",
     "\n",