docs: Bump docusaurus to 3.6.0 #14153

Job	Run time
windows-latest jdk-17 unit tests 1 / 2	29m 7s
windows-latest jdk-17 unit tests 2 / 2	29m 3s
Gradle MacOS integration	10m 54s
Sbt integration	47m 44s
macOS-latest jdk-17 unit tests 1 / 2	1h 4m 34s
macOS-latest jdk-17 unit tests 2 / 2	57m 45s
Maven integration	10m 12s
ubuntu-latest jdk-17 unit tests 1 / 2	18m 3s
Gradle integration	11m 0s
ubuntu-latest jdk-17 unit tests 2 / 2	18m 0s
Scala CLI integration	16m 33s
Mill integration	47m 32s
Bazel integration	12m 45s
LSP integration tests	34m 0s
Scala cross tests	32m 39s
Formatting	34s
Scalafix and docs	5m 4s
Sbt-metals/scripted jdk11	2m 39s
Scala javapc tests	1m 40s
Scala 2.11 cross tests	3m 59s
MiMa	1m 0s
	7h 34m 47s

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