Bump akka.version from 2.6.10 to 2.6.12

Bumps `akka.version` from 2.6.10 to 2.6.12.

Updates `akka-actor-typed_2.13` from 2.6.10 to 2.6.12
- [Release notes](https://github.com/akka/akka/releases)
- [Commits](akka/akka-core@v2.6.10...v2.6.12)

Updates `akka-actor-testkit-typed_2.13` from 2.6.10 to 2.6.12
- [Release notes](https://github.com/akka/akka/releases)
- [Commits](akka/akka-core@v2.6.10...v2.6.12)

Updates `akka-testkit_2.13` from 2.6.10 to 2.6.12
- [Release notes](https://github.com/akka/akka/releases)
- [Commits](akka/akka-core@v2.6.10...v2.6.12)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

akka/pom.xml

@@ -13,7 +13,7 @@
   <name>Java Examples - Akka</name>
 
   <properties>
-    <akka.version>2.6.10</akka.version>
+    <akka.version>2.6.12</akka.version>
     <logback.version>1.2.3</logback.version>
   </properties>