chore: removed 6.0.3 swift version from ci

Author: yehorsobko-mac

.github/workflows/ci.yml

@@ -17,7 +17,6 @@ jobs:
       matrix:
         os: [macos-latest, ubuntu-latest]
         swift-version:
-          - 6.0.3
           - 6.1.0
 
     runs-on: ${{ matrix.os }}