Bump log4j-api from 2.13.3 to 2.15.0

Bumps log4j-api from 2.13.3 to 2.15.0.

---
updated-dependencies:
- dependency-name: org.apache.logging.log4j:log4j-api
  dependency-type: direct:production
...
Signed-off-by: Ndependabot[bot] <support@github.com>

pom.xml

@@ -26,7 +26,7 @@
 		<servlet-api.version>3.1.0</servlet-api.version>
 		<commons-io.version>2.4</commons-io.version>
 		<commons-codec.version>1.9</commons-codec.version>
-		<log4j.version>2.13.3</log4j.version>
+		<log4j.version>2.15.0</log4j.version>
 		<slf4j.version>1.7.28</slf4j.version>
 		<jackson.version1>1.9.13</jackson.version1>
 		<jackson.version2>2.10.0</jackson.version2>