Bump dotnet/sdk from `cec8f5d` to `cec8f5d` in /docker #1197

Job	Run time
build-container / build-container (ubuntu-22.04-arm, alpine, linux-musl, arm64)	40s
build-ubuntu1604-native / build-ubuntu1604-native-container	1m 23s
build-container / build-container (ubuntu-22.04, alpine, linux-musl, x64)	24s
build	0s
test-build-managed	0s
test-build-windows-container-tests	0s
build-nuget-packages	0s
test-build-native	-1s
test-build-container	-1s
test-nuget-packages	-1s
test-jobs	0s
	2m 24s

Provide feedback