Update .github/workflows/tests.yml

Author: mattpolzin

.github/workflows/tests.yml

@@ -36,7 +36,6 @@ jobs:
           - swift:5.6-bionic
           - swift:5.6-focal
           - swift:5.6-amazonlinux2
-          - swift:5.7-jammy
     container: ${{ matrix.image }}
     steps:
     - name: Checkout code