[data-plane]: bump org.slf4j:slf4j-api in /data-plane

Bumps org.slf4j:slf4j-api from 2.0.9 to 2.0.15.

---
updated-dependencies:
- dependency-name: org.slf4j:slf4j-api
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

data-plane/pom.xml

@@ -50,7 +50,7 @@
     <jackson.version>2.14.1</jackson.version>
     <protobuf.version>3.25.2</protobuf.version>
     <bucket4j.version>7.6.0</bucket4j.version>
-    <slf4j.version>2.0.9</slf4j.version>
+    <slf4j.version>2.0.15</slf4j.version>
     <ch.qos.logback.version>1.4.14</ch.qos.logback.version>
     <net.logstash.logback.encoder.version>7.2</net.logstash.logback.encoder.version>
     <assertj.version>3.26.0</assertj.version>