Update notebook.ipynb

Corrected a minor typo

1-Introduction/01-defining-data-science/notebook.ipynb

@@ -115,7 +115,7 @@
    "source": [
     "## Step 3: Getting Insights\r\n",
     "\r\n",
-    "The most important step is to turn our data into some for from which we can draw insights. In our case, we want to extract keywords from the text, and see which keywords are more meaningful.\r\n",
+    "The most important step is to turn our data into some form from which we can draw insights. In our case, we want to extract keywords from the text, and see which keywords are more meaningful.\r\n",
     "\r\n",
     "We will use Python library called [RAKE](https://github.com/aneesha/RAKE) for keyword extraction. First, let's install this library in case it is not present: "
    ],