fix(deps): update dependency org.apache.logging.log4j:log4j-api to v2.21.0 (#54)

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

Author: renovate[bot]

build.gradle.kts

@@ -38,7 +38,7 @@ repositories {
 dependencies {
     compileOnly("xyz.theprogramsrc:simplecoreapi:0.8.0-SNAPSHOT")
 
-    implementation("org.apache.logging.log4j:log4j-api:2.20.0")
+    implementation("org.apache.logging.log4j:log4j-api:2.21.0")
     implementation("org.apache.logging.log4j:log4j-core:2.21.0")
 
     testImplementation("org.junit.jupiter:junit-jupiter:5.10.0")