ci: this is a paid runner

> The job was not started because recent account payments have failed or
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> Please check the 'Billing & plans' section in your settings

Author: tshepang

.github/workflows/ci.yml

@@ -14,7 +14,6 @@ jobs:
         # https://github.com/actions/virtual-environments#available-images
         os:
           - macOS-13 # x86
-          - macOS-13-xlarge # arm
           - macOS-14 # arm
           - macOS-14-large # x86
           - ubuntu-20.04