fix(deps): update dependency com.thesamet.scalapb:protoc-gen-scala to v0.11.20

Author: renovate[bot]

build.gradle

@@ -41,7 +41,7 @@ allprojects {
         metricsVersion = "3.0.4"
         protobufVersion = "3.25.8"
         pureconfigVersion = "0.17.9"
-        scalapbVersion = "0.11.18"
+        scalapbVersion = "0.11.20"
         scalapbJson4sVersion = "0.11.1"
         typesafeConfigVersion = "1.4.3"
         monixVersion = "3.4.0" // just for tests!