Merge pull request #980 from adamralph/update-ci-os

update CI OS

Author: adamralph

.github/workflows/ci.yml

@@ -19,13 +19,20 @@ jobs:
               framework: net8.0
               sdk: "8.0.101"
               sdk-major-minor: "8.0"
-          # current macOS, latest LTS and latest
+          # old macOS, latest LTS
           - job:
               os: macos-12
             tests:
               framework: net8.0
               sdk: "8.0.101"
               sdk-major-minor: "8.0"
+          # current macOS, latest LTS and latest
+          - job:
+              os: macos-13
+            tests:
+              framework: net8.0
+              sdk: "8.0.101"
+              sdk-major-minor: "8.0"
           # old Linux, latest LTS
           - job:
               os: ubuntu-20.04