Update silencer-lib, silencer-plugin from 1.7.3 to 1.7.4 (#566)

Author: scala-steward

project/Dependencies.scala

@@ -52,7 +52,7 @@ object Dependencies {
     val micrometerJmx = "1.7.0"
     val micrometerStatsD = "1.7.0"
     val monix = "3.4.0"
-    val silencer = "1.7.3"
+    val silencer = "1.7.4"
 
   }