Minor corrections

Author: turukawa

Lesson 2-1 - Validating restructured data against a schema using a spreadsheet.ipynb

@@ -424,7 +424,7 @@
     "    <p><b>Tutorial:</b></p>\n",
     "    <p>Complete the processing of the file you started working with in Lesson 1.</p>\n",
     "    <ul>\n",
-    "        <li><b>JSON schema</b>: Define a JSON schema to desribe and specify validation criteria for your dataset.</li>\n",
+    "        <li><b>JSON schema</b>: Define a JSON schema to describe and specify validation criteria for your dataset.</li>\n",
     "        <li><b>Check for invalid data</b>: Specify validation criteria in your spreadsheet application, check for invalid data and correct where necessary..</li>\n",
     "        <li><b>Save as CSV</b>: Export your machine-readable data from your spreadsheet application and save it as a <code>.csv</code>.</li>\n",
     "        <li><b>Validate</b>: Upload your CSV and JSON schema onto <a href=\"https://csvlint.io/\">CSVLint</a> and ensure you are successfully validated. Fix any errors you receive.</li>\n",