Roll fuchsia/sdk/core/mac-amd64 from 6_pZp... to 7fqYj... (#15966)

Roll fuchsia/sdk/core/mac-amd64 from 6_pZp... to 7fqYj...

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/fuchsia-mac-sdk-flutter-engine
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DEPS

@@ -532,7 +532,7 @@ deps = {
      'packages': [
        {
         'package': 'fuchsia/sdk/core/mac-amd64',
-        'version': '6_pZp3B40_WVCLaI_FN9W-uCpGjkVB88Rdx_FQIBve8C'
+        'version': '7fqYjLQltucjcyKQLh6XnHOQd6jQeQ4DoZ_Zbf630C4C'
        }
      ],
      'condition': 'host_os == "mac"',