Update Faust_to_QDax.ipynb (#201)

fix misspelled variable

examples/Faust_to_QDax/Faust_to_QDax.ipynb

@@ -60,7 +60,7 @@
     "```python\n",
     "import jax\n",
     "default_device = 'cpu' # or 'gpu'\r\n",
-    "jax.config.update('jax_platform_name',default_devicee)\n",
+    "jax.config.update('jax_platform_name',default_device)\n",
     "```\n",
     "\n",
     "You may want to pick CPU if your batch size is small. However, for larger batch sizes, the benefit of GPU parallelism will outweigh the worse single-item performance of a GPU relative to a CPU. For example, a CPU could produce 1 item of L-seconds of audio in 1 second. To get to 10 items, the CPU would take 10 seconds. However, in those same 10 seconds, the GPU might produce 20 equivalent items. The CPU took 1 second for its small batch, and the GPU took 10 seconds, but the GPU is twice as productive thanks to parallelism."