vmr to macos-13 (#44628)

Author: kasperk81

eng/pipelines/templates/variables/vmr-build.yml

@@ -93,7 +93,7 @@ variables:
   - name: poolName_LinuxArm64
     value: Docker-Linux-Arm-Public
   - name: poolImage_Mac
-    value: macos-12
+    value: macos-13
   - name: poolImage_Windows
     value: windows.vs2022preview.amd64.open
 - ${{ else }}: