Update book1.html

book1.html

@@ -73,10 +73,10 @@ <h2><a id="code">Code accompanying the book</h2>
 	<p>
 The code for each figure is stored in a separate file, either in the <a href="https://github.com/probml/pyprobml/tree/master/scripts">scripts</a> directory,
 or the <a href="https://github.com/probml/pyprobml/tree/master/notebooks">notebooks directory</a>. In the former case, you can click on the 'show source code' 
-button in colab to open the source code inside the colab editor; you can then make changes (e.g., to the parameters or data), and rerun it.
-Note, however, that  changes to local files will not be saved beyond the current colab session. In the latter case, you can click on the 'show notebook' button, 
+button in the figures colab to open the source code inside the colab editor; you can then make changes (e.g., to the parameters or data), and rerun it.
+Note, however, that  changes to local files will not be saved beyond the current colab session. In the latter case, you can click on the 'open colab' button, 
 and it will open the source notebook in a new tab, which can be edited in the usual way. (Scripts can also be run locally on your laptop,
-		but you may need to install certain packages, and some may be slow without a GPU.)
+		but you may need to install certain packages, and some may be slow without a GPU. In general it is easier to do everything inside of colab.)
 
 	<p>
 There are also some inline links to code in the body of the book, labeled <b>code.probml.ai/foo</b>; these refer to