Bump slf4j.version from 2.0.15 to 2.0.16

Bumps `slf4j.version` from 2.0.15 to 2.0.16.

Updates `org.slf4j:slf4j-api` from 2.0.15 to 2.0.16

Updates `org.slf4j:slf4j-simple` from 2.0.15 to 2.0.16

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

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -23,7 +23,7 @@
     <jetty.version>9.4.55.v20240627</jetty.version>
     <os72.protobuf.plugin-version>3.11.1</os72.protobuf.plugin-version>
     <protobuf.version>3.25.3</protobuf.version>
-    <slf4j.version>2.0.15</slf4j.version>
+    <slf4j.version>2.0.16</slf4j.version>
   </properties>
 
   <url>http://www.signalfx.com</url>