Merge pull request DOCGroup#212 from DOCGroup/jwillemsen-patch-1

Update macosx.yml

Author: jwillemsen

.github/workflows/macosx.yml

@@ -18,8 +18,8 @@ jobs:
   build:
     strategy:
       matrix:
-        cxxstd: ["11"]
-        os: [macos-11, macos-12]
+        cxxstd: ["17"]
+        os: [macos-12, macos-13]
         include:
           - platform_file: include $(ACE_ROOT)/include/makeinclude/platform_macosx.GNU
     runs-on: ${{ matrix.os }}