Roll Fuchsia GN SDK from RgErspyYHapUO2Spc... to sbh76PYVTMxav4ACT... (…

…flutter#53693)

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DEPS

@@ -255,7 +255,7 @@ vars = {
 
   # The version / instance id of the cipd:chromium/fuchsia/gn-sdk which will be
   # used altogether with fuchsia-sdk to generate gn based build rules.
-  'fuchsia_gn_sdk_version': 'RgErspyYHapUO2SpcW-vo2p8yaRUMUrq0eWjRVPfQjoC',
+  'fuchsia_gn_sdk_version': 'sbh76PYVTMxav4ACTgA-TXWcbZTZcWWjsqATCxrGIvwC',
 }
 
 gclient_gn_args_file = 'src/flutter/third_party/dart/build/config/gclient_args.gni'