Update slf4j-api, slf4j-simple to 2.0.13 (#41)

Co-authored-by: PJ Fanning <[email protected]>

Author: scala-steward

build.sbt

@@ -9,7 +9,7 @@ val swaggerVersion = "2.2.21"
 val pekkoVersion = "1.0.2"
 val pekkoHttpVersion = "1.0.1"
 val jacksonVersion = "2.17.1"
-val slf4jVersion = "2.0.12"
+val slf4jVersion = "2.0.13"
 val scala213 = "2.13.13"
 
 ThisBuild / scalaVersion := scala213