Update the nodejs action kind

tests/src/test/scala/org/apache/openwhisk/core/containerpool/v2/test/FunctionPullingContainerPoolTests.scala

@@ -99,7 +99,7 @@ class FunctionPullingContainerPoolTests
  // those for the behavior testing here, as none of the contents will really
  // reach a container anyway. We merely assert that passing and extraction of
  // the values is done properly.
- private val actionKind = "nodejs:8"
+ private val actionKind = "nodejs:20"
  private val exec = CodeExecAsString(RuntimeManifest(actionKind, ImageName("testImage")), "testCode", None)
  private val memoryLimit = MemoryLimit.STD_MEMORY.toMB.MB
  private val whiskAction = WhiskAction(EntityPath("actionSpace"), EntityName("actionName"), exec)