Update elixir.yml

Author: princemaple

.github/workflows/elixir.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         elixir: ['1.12', '1.11', '1.10', '1.9']
-        otp: ['24.0', '23.2', '22.3']
+        otp: ['24.x', '23.x', '22.x']
         exclude:
           - elixir: '1.9'
             otp: '24.0'