patch log4j vulnerability

.gitignore

 .idea
 .gradle
+.metals
 build
-out
\ No newline at end of file
+out

build.gradle

@@ -38,7 +38,7 @@ repositories {
 
 ext {
     kafkaV = '2.3.1'
-    log4jV = '2.11.2'
+    log4jV = '2.15.0'
 }
 
 dependencies {
@@ -130,4 +130,4 @@ publishing {
             }
         }
     }
-}
\ No newline at end of file
+}