Add macos-13 os to testmatrix to test on x86-64

Author: matthiasblaesing

.github/workflows/ci.yaml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         java: [8, 11, 17, 21, 23-ea]
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, macos-13, macos-latest]
         exclude:
           # 23-ea is not available for mac OS
           - java: 23-ea