skip integration test in GH actions

actions/testdata/env.workflow

@@ -0,0 +1,9 @@
+workflow "test" {
+  on = "push"
+  resolves = ["test-action"]
+}
+
+action "test-action" {
+  uses = "docker://alpine:3.9"
+  runs = ["sh", "-c", "echo $GITHUB_REPOSITORY | grep '^nektos/act$'"]
+}