Quote the channel name in color channel deprecations #1592

Job	Run time
Language \| Dart Sass \| Dart ${{ matrix.dart_channel }}	0s
JS API \| Pure JS \| Browser	0s
JS API \| Embedded \| Node lts/* \| ubuntu-latest	4m 56s
JS API \| Pure JS \| Node ${{ matrix.node_version }} \| ${{ matrix.os }}	0s
JS API \| Embedded \| Node lts/* \| windows-latest	7m 15s
Lint spec files	15s
JS API \| Embedded \| Node lts/* \| macos-latest	3m 39s
Static analysis	17s
Unit tests	40s
JS API \| Embedded \| Node lts/-1 \| ubuntu-latest	4m 50s
JS API \| Embedded \| Node lts/-2 \| ubuntu-latest	5m 6s
JS API \| Embedded \| Node lts/-3 \| ubuntu-latest	1m 45s
	28m 43s

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