Update README.txt

Updated to work in latest brew versions. --cask command is outdated.
2021-05-11 21:52:12 +02:00 · 2021-05-11 21:52:12 +02:00 · 4e040928e6
commit 4e040928e6
--- a/distr/README.txt
+++ b/distr/README.txt
@ -27,7 +27,7 @@ OR
 Use http://brew.sh:

    `brew tap homebrew/cask-fonts`
-    `brew install --cask font-fira-code`
+    `brew install font-fira-code`


 Ubuntu Zesty (17.04), Debian Stretch (9) or newer