Upgrade Flutter version to include fix for skwasm renderer (#8416)

diff --git a/flutter-candidate.txt b/flutter-candidate.txt
index 211c0e7..6a435c0 100644
--- a/flutter-candidate.txt
+++ b/flutter-candidate.txt
@@ -1 +1 @@
-ec2e12ba5099de6355f65fb70b1b237196f8d254
+e5cbed969cb2916bdfd1bb501e5533bef9feef64