chore: remove node 18 ci

Author: dominikg

.github/workflows/ci.yml

@@ -77,8 +77,6 @@ jobs:
         node: [22]
         os: [ubuntu-latest, macos-latest, windows-latest]
         include:
-          - node: 18
-            os: ubuntu-latest
           - node: 20
             os: ubuntu-latest
           - node: 24