ci: update tests to pass for english

This is a temporary fix for the CI, we need to add the lang var

client/plugins/fcc-create-nav-data/create-navigation-node.test.js

@@ -25,7 +25,7 @@ describe('fcc-create-nav-data', () => {
       },
       fileAbsolutePath: path.resolve(
         __dirname,
-        '../../src/pages/guide/php/functions/files/file-writing/index.md'
+        '../../src/pages/guide/english/php/functions/files/file-writing/index.md'
       )
     };