fix typos

Author: scottyhq

intermediate/storage_formats.ipynb

@@ -34,7 +34,7 @@
     "\n",
     "Many storage formats for scientific data include some notion of \"groups\". \n",
     "\n",
-    "The exact meaning of \"group\" differs between formats but  are all ultimately motivated by a common recognition: that real scientific datasets often include related but otherwise heterogenous data."
+    "The exact meaning of \"group\" differs between formats but  are all ultimately motivated by a common recognition: that real scientific datasets often include related but otherwise heterogeneous data."
    ]
   },
   {
@@ -48,7 +48,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "We'll start with Zarr, because it has the most simple type of heirarchical structure."
+    "We'll start with Zarr, because it has the most simple type of hierarchical structure."
    ]
   },
   {