Upgrade sbt-sassify version in docs #3017

Job	Run time
Extra variables	1s
Prefetch dependencies and JVMs for caching / Prepare Matrix	1s
Prefetch dependencies and JVMs for caching / { "java": "11" }	42s
Code Style / Prepare Matrix	1s
Binary Compatibility / JDK 11	3m 48s
Code Style Docs / Prepare Matrix	1s
Code Style Docs / { "java": "11" }	4m 20s
Code Style / { "java": "11" }	1m 34s
Publish Local / Prepare Matrix	1s
Tests / Prepare Matrix	1s
Docs Tests / Prepare Matrix	1s
Publish Local / { "java": "11" }	5m 47s
Docs Tests / { "java": "11", "scala": "2.13.x" }	6m 36s
Docs Tests / { "java": "11", "scala": "3.x" }	6m 5s
Tests / { "java": "11", "scala": "2.13.x", "sbt_test_task": "test" }	9m 35s
Tests / { "java": "11", "scala": "3.x", "sbt_test_task": "test" }	9m 19s
Scripted Tests / Prepare Matrix	1s
Scripted Tests / { "java": "11", "scala": "2.13.x", "sbt": "1.9.8", "sbt_steps": "*1of3" }	7m 55s
Scripted Tests / { "java": "11", "scala": "2.13.x", "sbt": "1.9.8", "sbt_steps": "*2of3" }	6m 27s
Scripted Tests / { "java": "11", "scala": "2.13.x", "sbt": "1.9.8", "sbt_steps": "*3of3" }	8m 21s
Scripted Tests / { "java": "11", "scala": "3.x", "sbt": "1.9.8", "sbt_steps": "*1of3" }	8m 30s
Scripted Tests / { "java": "11", "scala": "3.x", "sbt": "1.9.8", "sbt_steps": "*2of3" }	6m 44s
Scripted Tests / { "java": "11", "scala": "3.x", "sbt": "1.9.8", "sbt_steps": "*3of3" }	8m 17s
Finish / Ready To Merge	1s
	1h 34m 9s

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