Update akka to v2.8.6

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This PR contains the following updates:

Package	Type	Update	Change
com.typesafe.akka:akka-actor (source)		patch	2.8.5 -> 2.8.6
com.typesafe.akka:akka-stream (source)		patch	2.8.5 -> 2.8.6
com.typesafe.akka:akka-stream-testkit (source)	test	patch	2.8.5 -> 2.8.6

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Release Notes

akka/akka (com.typesafe.akka:akka-actor)

v2.8.6

Compare Source

What's Changed

• chore: MiMa 2.8.5 (release-2.8) by @​patriknw in https://github.com/akka/akka/pull/32119
• doc: Backport drop usage of scalafiddle (#​32052) by @​johanandren in https://github.com/akka/akka/pull/32213
• doc: Simpler old-version-warning backport from 2.9 by @​johanandren in https://github.com/akka/akka/pull/32217
• fix: Entity stuck in passivation backport from 2.9 (#​32439) by @​sebastian-alfers in https://github.com/akka/akka/pull/32451
• chore: License change date for 2.8.6 by @​sebastian-alfers in https://github.com/akka/akka/pull/32455

Full Changelog: akka/akka@v2.8.5...v2.8.6

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