fix typo

Author: fedorov

notebooks/getting_started/part1_prerequisites.ipynb

@@ -272,7 +272,7 @@
         "\n",
         "Over time, as you keep using IDC, your understanding of the data will grow along with your needs. With Google BigQuery it is possible to search _all_ of the metadata accompanying IDC files. In this section we will set up the prerequisites for using Google BigQuery. [Part 3](https://github.com/ImagingDataCommons/IDC-Tutorials/blob/master/notebooks/getting_started/part3_exploring_cohorts.ipynb) of this tutorial series will give you an introduction into how to work with BigQuery.\n",
         "\n",
-        "To get started with BigQuery you need is a Google account (google identity) and a web browser. If you don't have a Google account, you can learn how to get one [here](https://accounts.google.com/signup/v2/webcreateaccount?dsh=308321458437252901&continue=https%3A%2F%2Faccounts.google.com%2FManageAccount&flowName=GlifWebSignIn&flowEntry=SignUp#FirstName=&LastName=). Note that you do NOT need a Gmail email account - [you can use your non-Gmail email address to create one instead](https://support.google.com/accounts/answer/27441?hl=en#existingemail).\n",
+        "To get started with BigQuery all you need is a Google account (google identity) and a web browser. If you don't have a Google account, you can learn how to get one [here](https://accounts.google.com/signup/v2/webcreateaccount?dsh=308321458437252901&continue=https%3A%2F%2Faccounts.google.com%2FManageAccount&flowName=GlifWebSignIn&flowEntry=SignUp#FirstName=&LastName=). Note that you do NOT need a Gmail email account - [you can use your non-Gmail email address to create one instead](https://support.google.com/accounts/answer/27441?hl=en#existingemail).\n",
         "\n",
         "[!WARNING]\n",
         "\n",