chore(deps): bump karaf.version from 4.2.7 to 4.2.8

Bumps `karaf.version` from 4.2.7 to 4.2.8.

Updates `common` from 4.2.7 to 4.2.8

Updates `apache-karaf-minimal` from 4.2.7 to 4.2.8

Updates `karaf-maven-plugin` from 4.2.7 to 4.2.8

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

platforms/karaf/pom.xml

@@ -34,7 +34,7 @@
   </modules>
 
   <properties>
-    <karaf.version>4.2.7</karaf.version>
+    <karaf.version>4.2.8</karaf.version>
     <osgi.version>6.0.0</osgi.version>
     <pax.exam.version>4.13.1</pax.exam.version>
   </properties>