Add Katex CSS to fix appearance of LaTeX equations in build

docusaurus.config.js

@@ -168,13 +168,11 @@ export default {
 
     stylesheets: [
         {
-            href: 'https://cdn.jsdelivr.net/npm/katex@0.13.24/dist/katex.min.css',
+            href: '/katex/katex.min.css',
             type: 'text/css',
-            integrity:
-                'sha384-odtC+0UGzzFL/6PNoE8rX/SPcQDXBJ+uRepguP4QkPCm2LBxH3FA3y+fKSiJ+AmM',
-            crossorigin: 'anonymous',
         },
     ],
+
     future: {
             v4: true,
         faster: true,