Update veggie seasons README.md #6115

Job	Run time
web/samples_index config check	45s
ios-build	8m 22s
Test Flutter stable on ubuntu-latest	16m 44s
Test Flutter stable on macos-latest	24m 48s
Test Flutter stable on windows-latest	25m 37s
Test Flutter beta on ubuntu-latest	7m 26s
Test Flutter beta on macos-latest	11m 25s
Test Flutter beta on windows-latest	13m 50s
Test Flutter master on ubuntu-latest	10m 23s
Test Flutter master on macos-latest	23m 26s
Test Flutter master on windows-latest	18m 19s
	2h 41m 5s

Provide feedback