[flutter_tools] cache the base URL as index.html (#53666)

https://dart.googlesource.com/external/github.com/flutter/flutter/+/bb5c3400669aed84585b92f67a422d21a42da0e2
1 file changed
tree: c84f00e27fa949b6d8a56971bfc288cab3786889
  1. commits.json