fix(random): match the /gachabeta clip length to the 6-second beta wish

internal/modules/random/gacha_api_client.go

@@ -24,7 +24,7 @@ type gachaStyle struct {
 
 var (
 	gachaStyleWish = gachaStyle{Path: "gacha", Duration: 7}
-	gachaStyleBeta = gachaStyle{Path: "gachabeta", Duration: 11}
+	gachaStyleBeta = gachaStyle{Path: "gachabeta", Duration: 6}
 )
 
 type gachaAPIRequest struct {

internal/modules/random/gacha_command_test.go

@@ -208,8 +208,8 @@ func TestGachaBeta_UsesBetaRendererAndAnyoneCanRunIt(t *testing.T) {
 	if animation == nil {
 		t.Fatalf("calls = %+v, want a sendAnimation", rb.Sent())
 	}
-	if got := animation.Form["duration"]; got != "11" {
-		t.Fatalf("duration = %q, want 11", got)
+	if got := animation.Form["duration"]; got != "6" {
+		t.Fatalf("duration = %q, want 6", got)
 	}
 }