add flush to compatibility list (#639)

Author: Foso

docs/src/orchid/resources/data/twig-compatibility/tags.yml

@@ -24,7 +24,8 @@
   page: 'filter'
 - name: 'flush'
   twigLink: 'https://twig.symfony.com/doc/2.x/tags/flush.html'
-  support: 'none'
+  support: 'full'
+  page: 'flush'
 - name: 'for'
   twigLink: 'https://twig.symfony.com/doc/2.x/tags/for.html'
   support: 'full'