CI: Test Dialyzer only for Erlang < 28

Author: badlop

.github/workflows/ci.yml

@@ -20,6 +20,7 @@ jobs:
     - run: rebar3 compile
     - run: rebar3 xref
     - run: rebar3 dialyzer
+      if: matrix.otp < 28
     - run: rebar3 eunit -v
       if: matrix.otp >= 28
     - run: REBAR=rebar3 make spec