docs: add "useStyle10" to readme and changelog

Author: nsandstrom

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 All notable changes for major version updates will be documented here.
 
+## 9.2.0
+
+Cortina helper accepts a new parameter `useStyle10` that serves blocks tailored to the new version of KTH-Style.  
+If the parameter is false or missing, blocks tailored for KTH-Style 9 will be fetched.
+
 ## 9.0.0
 
 - **Breaking:** function `registerBreadcrumbHelper` no longer takes any config. All breadcrumbs now need to be manually sent to `res.render` on **every request**.

README.md

@@ -63,7 +63,8 @@ route.use('/app/mount/point', require('@kth/kth-node-web-common/lib/web/cortina'
   globalLink: true, // Default false if not set, if true the language link point to the startpage of KTH,
   supportedLanguages: ['sv'], // Optional - set to languges supported - if only one language is supported, globalLink sets to true
   siteNameKey = 'site_name', // Defaults to site_name. This key need to be set in i18n messages file
-  localeTextKey = 'locale_text', // Defaults to locale_text. This key need to be set in i18n messages file
+  localeTextKey = 'locale_text', // Defaults to locale_text. This key need to be set in i18n messages file,
+  useStyle10: true, // Decides which view of the block to fetch. Defaults to false, which uses views tailored for style9
 }))
 ```