Update "shortcut icon" to "icon" (#63154)

https://dart.googlesource.com/external/github.com/flutter/flutter/+/5cf3c8728cac080bde212e9e2bcd4a689c66a7ac
diff --git a/commits.json b/commits.json
index 5583995..2fc1f46 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "external/github.com/flutter/engine":"e50219fdc5cc7ac2e754052e00226a6436e26b66",
-  "external/github.com/flutter/flutter":"6d9291cbb032e7e40b0ac17875c1ea0713ef2389",
+  "external/github.com/flutter/flutter":"5cf3c8728cac080bde212e9e2bcd4a689c66a7ac",
   "sdk":"0aa5b0f019b9fb3d2894040107062f650ccb2c9e"
 }
\ No newline at end of file