bump: Akka 2.9.0-M2, Akka HTTP 10.6.0-M1 #1086

Job	Run time
Checks	3m 18s
Compile and test (2.13)	7m 59s
Compile and test (3.3)	8m 28s
Compile Benchmarks	4m 56s
sbt scripted tests (gen-scala-server, 2.13)	12m 38s
sbt scripted tests (gen-java, 2.13)	9m 1s
Docs	6m 22s
sbt scripted tests (scala-2_13, 2.13)	6m 0s
sbt scripted tests (scala3, 3.3)	7m 52s
Gradle tests	6m 17s
Maven tests	6m 14s
	1h 19m 5s

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