test: Ensure bypass_actors serializes as an empty array when clearing ruleset bypass actors (#3734)

Author: MathieuSevegny

github/repos_rules_test.go

@@ -461,6 +461,7 @@ func TestRepositoriesService_UpdateRulesetClearBypassActor(t *testing.T) {
 
 	mux.HandleFunc("/repos/o/repo/rulesets/42", func(w http.ResponseWriter, r *http.Request) {
 		testMethod(t, r, "PUT")
+		testBody(t, r, `{"bypass_actors":[]}`+"\n")
 		fmt.Fprint(w, `{
 			"id": 42,
 			"name": "ruleset",