Update smithy4s-sbt-codegen to 0.18.45

Author: dwolla-oss-scala-steward[bot]

project/plugins.sbt

@@ -1,5 +1,5 @@
 addSbtPlugin("org.typelevel" % "sbt-typelevel-settings" % "0.8.2")
 addSbtPlugin("org.typelevel" % "sbt-typelevel-mergify" % "0.8.2")
 addSbtPlugin("com.github.sbt" % "sbt-native-packager" % "1.9.16")
-addSbtPlugin("com.disneystreaming.smithy4s" % "smithy4s-sbt-codegen" % "0.18.43")
+addSbtPlugin("com.disneystreaming.smithy4s" % "smithy4s-sbt-codegen" % "0.18.45")
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.13.1")