chore: Replace Airflow 2.8 for 3.0 in CI

Author: tomasfarias

.github/workflows/ci.yaml

@@ -29,16 +29,12 @@ jobs:
           - '3.10'
           - '3.9'
         airflow-version:
+          - '3.0'
           - '2.10'
           - '2.9'
-          - '2.8'
         dbt-version:
           - 1.9
           - 1.8
-        exclude:
-          # Incompatible combinations
-          - python-version: 3.12
-            airflow-version: '2.8'
 
     runs-on: ubuntu-latest
     steps: