fix: upgrade org.apache.pekko:pekko-stream_3 from 1.2.1 to 1.4.0

Snyk has created this PR to upgrade org.apache.pekko:pekko-stream_3 from 1.2.1 to 1.4.0.

See this package in maven:
org.apache.pekko:pekko-stream_3

See this project in Snyk:
https://app.snyk.io/org/pantheon.tech/project/22a78fbe-a55f-412d-bb98-efcfd3bf82f0?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

lighty-core/dependency-versions/pom.xml

@@ -222,7 +222,7 @@
             <dependency>
                 <groupId>org.apache.pekko</groupId>
                 <artifactId>pekko-stream_3</artifactId>
-                <version>1.2.1</version>
+                <version>1.4.0</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.pekko</groupId>