Fix page break on selecting of Markdown (#26)

* import of prism-markdown

commented in import of prims-makrdown and moved under import of prism-markup

* fix example in README.md

Author: veyxos

README.md

@@ -69,8 +69,8 @@ import 'prismjs/components/prism-docker';
 import 'prismjs/components/prism-javascript';
 import 'prismjs/components/prism-json';
 import 'prismjs/components/prism-less';
-import 'prismjs/components/prism-markdown';
 import 'prismjs/components/prism-markup';
+import 'prismjs/components/prism-markdown';
 import 'prismjs/components/prism-nginx';
 import 'prismjs/components/prism-python';
 import 'prismjs/components/prism-scss';

packages/volto-code-block/src/index.js

@@ -26,14 +26,14 @@ import 'prismjs/components/prism-javascript';
 import 'prismjs/components/prism-typescript';
 import 'prismjs/components/prism-json';
 import 'prismjs/components/prism-less';
-// import 'prismjs/components/prism-markdown';
 import 'prismjs/components/prism-markup';
 import 'prismjs/components/prism-mermaid';
 import 'prismjs/components/prism-nginx';
 import 'prismjs/components/prism-python';
 import 'prismjs/components/prism-scss';
 import 'prismjs/components/prism-yaml';
 // They have to be the last ones (at least after markup)
+import 'prismjs/components/prism-markdown';
 import 'prismjs/components/prism-jsx';
 import 'prismjs/components/prism-tsx';