chore(version): Bump version 2.6.0 #1417

Job	Run time
test / test-dart-vm (3.3.0)	1m 39s
test / test-dart-vm (stable)	1m 26s
dart2js_test / test-dart-2js (3.3.0, chrome)	7m 15s
ddc_test / test-dart-ddc (3.3.0, chrome)	5m 16s
dart2js_test / test-dart-2js (3.3.0, firefox)	7m 16s
native_test / test-dart-native (macos-14)	1m 4s
ddc_test / test-dart-ddc (3.3.0, firefox)	5m 4s
dart2js_test / test-dart-2js (stable, chrome)	8m 5s
dart2js_test / test-dart-2js (stable, firefox)	9m 33s
native_test / test-dart-native (windows-latest)	3m 12s
ddc_test / test-dart-ddc (stable, chrome)	4m 41s
ddc_test / test-dart-ddc (stable, firefox)	5m 3s
	59m 34s

Provide feedback