Fixed using jupyter image links error

Author: mParkesUCL

lessons/basics/using_jupyter_notebook.md

@@ -27,7 +27,7 @@ pip install jupyter
 ### Open JupyterLab
 If using Anaconda **Search for the program _Anaconda Navigator_ and open it**. After a few seconds, you should see a window like this appear:
 
-![Window showing six logos for different programs. A red arrow points to the "Launch" button below the top right logo.](/lessons/basics/images/navigator_jupyterlab.png)
+![Window showing six logos for different programs. A red arrow points to the "Launch" button below the top right logo.](images/navigator_jupyterlab.png)
 
 **Press the "Launch" under JupyterLab.** 
 
@@ -37,13 +37,13 @@ jupyter lab
 ```
 This will open a tab on your default web browser which should look like this:
 
-![Window showing a folder navigation menu on the left and a Python 3 logo on the right.](/lessons/basics/images/jupyterlab.png)
+![Window showing a folder navigation menu on the left and a Python 3 logo on the right.](images/jupyterlab.png)
 
 Look at the address bar at the top of your browser. It should read `localhost` followed by some numbers. This means that you are not actually accessing the internet, despite being on a web browser. The page is generated locally by your computer, so you don't need an internet connection to work on your Jupyter Notebook.
 
 **In the sidebar on the left, search through your folders for your `.ipynb` file and double-click on it.** If you just downloaded this file, it might be in your _Downloads_ folder. Your screen should now show this:
 
-![Screenshot of a Jupyter Notebook.](/lessons/basics/images/example_notebook.png)
+![Screenshot of a Jupyter Notebook.](images/example_notebook.png)
 
 You have just opened the Jupyter Notebook.
 
@@ -54,21 +54,21 @@ There are two important kinds of cells: _Markdown_ and _Code_.
 
 You can tell what kind a cell is by looking at the top ribbon:
 
-![Top bar of the Jupyter Notebook with the word "Markdown" circled in red.](/lessons/basics/images/top_bar.png)
+![Top bar of the Jupyter Notebook with the word "Markdown" circled in red.](images/top_bar.png)
 
 ### Markdown cells
 Markdown cells can contain formatted text and images. To change this content, **double-click on the cell**. This will show you the unformatted text, which has been written using a language called "Markdown":
 
-![A box of raw Markdown text.](/lessons/basics/images/raw_markdown.png)
+![A box of raw Markdown text.](images/raw_markdown.png)
 
 To make the text appear formatted again, make sure that the cell is selected, and **click on the "Run" button in the top ribbon** (Shortcut: Shift + Enter):
 
-![Top bar of the Jupyter Notebook with the "run" triangle circled in red.](/lessons/basics/images/run_button.png)
+![Top bar of the Jupyter Notebook with the "run" triangle circled in red.](images/run_button.png)
 
 ### Code cells
 Code cells contain programming code; in this case—Python. **Select the code cell, and run it, just like you ran the Markdown cell.** The result should look like this:
 
-![Code cell showing "print(753+247)", and below, the result: 1000.](/lessons/basics/images/code_cell.png)
+![Code cell showing "print(753+247)", and below, the result: 1000.](images/code_cell.png)
 
 Observe how the output of the Python code (the number 1000) is printed below the cell. Additionally, a new empty code cell was created below, to let you continue writing code.