build(deps): update sbt-tpolecat to 0.5.6 (#2033)

Author: hugo-vrijswijk

project/plugins.sbt

@@ -1,6 +1,6 @@
 addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.11.2")
 addSbtPlugin("io.stryker-mutator" % "sbt-stryker4s" % "0.21.0")
-addSbtPlugin("org.typelevel" % "sbt-tpolecat" % "0.5.5")
+addSbtPlugin("org.typelevel" % "sbt-tpolecat" % "0.5.6")
 addSbtPlugin("com.eed3si9n" % "sbt-projectmatrix" % "0.11.0")
 
 // Protobuf plugin and its dependencies