doc(oohelper): tweak documentation (#499)

Part of https://github.com/ooni/probe/issues/1733

internal/cmd/oohelperd/internal/websteps/measure.go

@@ -28,8 +28,11 @@ type Config struct {
 }
 
 // Measure performs the three consecutive steps of the testhelper algorithm:
+//
 // 1. InitialChecks
+//
 // 2. Explore
+//
 // 3. Generate
 func Measure(ctx context.Context, creq *CtrlRequest, config *Config) (*ControlResponse, error) {
 	var (

internal/cmd/oohelperd/internal/websteps/websteps.go

@@ -27,7 +27,7 @@ var newfailure = archival.NewFailure
 // including the empirical CDF of the body size for test lists URLs.
 const maxAcceptableBody = 1 << 24
 
-// Handler implements the Web Connectivity test helper HTTP API.
+// Handler implements the websteps test helper HTTP API.
 type Handler struct {
 	Config *Config
 }