Update 05_intro_to_dask.ipynb - update URL for Dask diagram

Author: kafitzgerald

fundamentals/05_intro_to_dask.ipynb

@@ -160,7 +160,7 @@
     "A crucal difference with Dask is that we must specify the `chunks` argument.\n",
     "\"Chunks\" describes how the array is split up over many sub-arrays.\n",
     "\n",
-    "![Dask Arrays](http://docs.dask.org/en/latest/_images/dask-array-black-text.svg)\n",
+    "![Dask Arrays](https://docs.dask.org/en/latest/_images/dask-array.svg)\n",
     "_source:\n",
     "[Dask Array Documentation](http://docs.dask.org/en/latest/array-overview.html)_\n",
     "\n",