Add SRI tags

Author: rameshvarun

README.md

@@ -17,8 +17,8 @@ Just drop in JS / CSS imports and start creating code cells using `<script type=
 
 ```html
 <!-- Import blog-cells JS and CSS files. -->
-<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/blog-cells.css" />
-<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/blog-cells.js"></script>
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/blog-cells.css" integrity="sha384-WTyObMIz+pJFKKBrAWAzdQR97p6wSVxgp4MrCmb2kxgAqz5M8sPvKBINcDpp1ERV" crossorigin="anonymous">
+<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/blog-cells.js" integrity="sha384-8IdgH/vqj5QT2hghXrEdBvZwtNAK82dxP4JdkptO3xpqDeOFij/7sR2rqwQlHXPt" crossorigin="anonymous"></script>
 
 <!-- Create your code cells in script tags -->
 <script type="text/notebook-cell">
@@ -65,8 +65,8 @@ You can easily define and use your own custom kernels.
 
 ```html
 <!-- Import blog-cells JS and CSS files. -->
-<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/blog-cells.css" />
-<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/blog-cells.js"></script>
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/blog-cells.css" integrity="sha384-WTyObMIz+pJFKKBrAWAzdQR97p6wSVxgp4MrCmb2kxgAqz5M8sPvKBINcDpp1ERV" crossorigin="anonymous">
+<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/blog-cells.js" integrity="sha384-8IdgH/vqj5QT2hghXrEdBvZwtNAK82dxP4JdkptO3xpqDeOFij/7sR2rqwQlHXPt" crossorigin="anonymous"></script>
 
 <!-- Define custom kernel -->
 <script>