Back to running dialyzer only under OTP-27

Author: solnic

.github/workflows/main.yml

@@ -25,12 +25,12 @@ jobs:
           - elixir: '1.18.4-otp-27'
             otp: '28.0'
             lint: true
-            dialyzer: true
             os: ubuntu-latest
 
           - elixir: '1.18'
             otp: '27.2'
             lint: true
+            dialyzer: true
             os: ubuntu-latest
 
           # One version before the last supported one.