all: update Oto to v3.5.0-alpha.4

Author: hajimehoshi

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/ebitengine/debugui v0.2.0
 	github.com/ebitengine/gomobile v0.0.0-20260211053922-3d992dae95d1
 	github.com/ebitengine/hideconsole v1.0.0
-	github.com/ebitengine/oto/v3 v3.5.0-alpha.3.0.20260414020926-c7371b45fd92
+	github.com/ebitengine/oto/v3 v3.5.0-alpha.4
 	github.com/ebitengine/purego v0.11.0-alpha.1
 	github.com/gen2brain/mpeg v0.5.0
 	github.com/go-text/typesetting v0.3.5-0.20260328164731-48df487c1500

go.sum

@@ -4,8 +4,8 @@ github.com/ebitengine/gomobile v0.0.0-20260211053922-3d992dae95d1 h1:U8WldvN7/4c
 github.com/ebitengine/gomobile v0.0.0-20260211053922-3d992dae95d1/go.mod h1:J7sDBRQG9pJGMa9Z+h8l3flwk0yEKDzWeR57vA1LI5U=
 github.com/ebitengine/hideconsole v1.0.0 h1:5J4U0kXF+pv/DhiXt5/lTz0eO5ogJ1iXb8Yj1yReDqE=
 github.com/ebitengine/hideconsole v1.0.0/go.mod h1:hTTBTvVYWKBuxPr7peweneWdkUwEuHuB3C1R/ielR1A=
-github.com/ebitengine/oto/v3 v3.5.0-alpha.3.0.20260414020926-c7371b45fd92 h1:Cni4aq8DIPk4Chrh6wck5FR48FSLlSYEP66z++kLwsM=
-github.com/ebitengine/oto/v3 v3.5.0-alpha.3.0.20260414020926-c7371b45fd92/go.mod h1:x/WBbSrO8m/lqbRD1lp+op0K9vg6v6QPVPrVTErFvbE=
+github.com/ebitengine/oto/v3 v3.5.0-alpha.4 h1:rFt4g4xfKzpEvsS/JbfEatC+lsujWLHkpJELjUxAMWA=
+github.com/ebitengine/oto/v3 v3.5.0-alpha.4/go.mod h1:x/WBbSrO8m/lqbRD1lp+op0K9vg6v6QPVPrVTErFvbE=
 github.com/ebitengine/purego v0.11.0-alpha.1 h1:p9MRdpEz2yC1tLE132XVQtQa+hmnj2DeKQ0Djc8n3n0=
 github.com/ebitengine/purego v0.11.0-alpha.1/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
 github.com/gen2brain/mpeg v0.5.0 h1:YrY5F5ZQAJCF/ItDHSb0bF5fxwk5IDq/RjOnfFhWurs=