chore(version): Bump version 2.6.0 #2281

Job	Run time
test / test-dart-vm (3.3.0)	4m 10s
test / test-dart-vm (stable)	4m 22s
dart2js_test / test-dart-2js (3.3.0, chrome)	17m 10s
ddc_test / test-dart-ddc (3.3.0, chrome)	10m 12s
native_test / test-dart-native (macos-14)	1m 17s
dart2js_test / test-dart-2js (3.3.0, firefox)	18m 34s
ddc_test / test-dart-ddc (3.3.0, firefox)	10m 51s
native_test / test-dart-native (windows-latest)	2m 54s
dart2js_test / test-dart-2js (stable, chrome)	18m 26s
ddc_test / test-dart-ddc (stable, chrome)	10m 45s
dart2js_test / test-dart-2js (stable, firefox)	19m 10s
ddc_test / test-dart-ddc (stable, firefox)	11m 14s
	2h 9m 5s

Provide feedback