Merge pull request #13252 from overleaf/mj-rcases

[lezer] Support rcases

GitOrigin-RevId: 0bc0650533508ea8fb7c5f5953a6b1dc779db4ef

services/web/frontend/js/features/source-editor/lezer-latex/tokens.mjs

@@ -720,6 +720,8 @@ const equationArrayEnvNames = new Set([
   'cases*',
   'dcases',
   'dcases*',
+  'rcases',
+  'rcases*',
   'IEEEeqnarray',
   'IEEEeqnarray*',
 ])