Update dependency org.apache.logging.log4j:log4j-slf4j2-impl to v2.21…

….0 (#774)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -29,7 +29,7 @@ cpg-language-java = { module = "de.fraunhofer.aisec:cpg-language-java", version.
 #cpg-language-go = { module = "com.github.Fraunhofer-AISEC.cpg:cpg-language-go", version.ref = "cpg"}
 
 kotlin-logging = { module = "io.github.oshai:kotlin-logging-jvm", version = "5.1.0" }
-log4j-impl = { module = "org.apache.logging.log4j:log4j-slf4j2-impl", version = "2.20.0"}
+log4j-impl = { module = "org.apache.logging.log4j:log4j-slf4j2-impl", version = "2.21.0"}
 clikt = { module = "com.github.ajalt.clikt:clikt", version = "4.2.1"}
 koin = { module = "io.insert-koin:koin-core", version.ref = "koin"}
 koin-test = { module = "io.insert-koin:koin-test", version.ref = "koin-test"}