Fixup osx runner

Author: Tobias-Fischer

vinca/generate_gha.py

@@ -307,7 +307,7 @@ def build_linux_pipeline(
 def build_osx_pipeline(
     stages,
     trigger_branch,
-    vm_imagename="macos-11",
+    vm_imagename="macos-13",
     outfile="osx.yml",
     azure_template=None,
     script=azure_osx_script,