Merge pull request #239 from jwillemsen/jwi-depmacos13

Remove macos13, runners are deprecated at github

Author: jwillemsen

.github/workflows/macosx.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         cxxstd: ["17"]
-        os: [macos-13, macos-14]
+        os: [macos-14]
         include:
           - platform_file: include $(ACE_ROOT)/include/makeinclude/platform_macosx.GNU
     runs-on: ${{ matrix.os }}