all: update Ebitengine to v2.10.4

Update Ebitengine to include the macOS superclass dispatch fix for
recursive text input responder calls.

Closes #53

Co-Authored-By: Codex <noreply@openai.com>

Author: hajimehoshi

go.mod

@@ -5,7 +5,7 @@ go 1.25.0
 require (
 	github.com/go-text/typesetting v0.3.5
 	github.com/hajimehoshi/bitmapfont/v4 v4.2.0
-	github.com/hajimehoshi/ebiten/v2 v2.10.0-rc.3
+	github.com/hajimehoshi/ebiten/v2 v2.10.4
 	github.com/kisielk/errcheck v1.20.0
 	golang.org/x/tools v0.49.0
 )

go.sum

@@ -12,8 +12,8 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/hajimehoshi/bitmapfont/v4 v4.2.0 h1:bpeN2ph7aHSuX7yoWFkLPo4ado9K+E+Dq7t6MoFcJAU=
 github.com/hajimehoshi/bitmapfont/v4 v4.2.0/go.mod h1:AIeoQek1nxUmDczXNtFEYWTQ4ArINijutPD729q/NeE=
-github.com/hajimehoshi/ebiten/v2 v2.10.0-rc.3 h1:4h8Fhl4GdFuOeJmQ54bd7m7SfkK+8ecJVk0Q7DNIuYY=
-github.com/hajimehoshi/ebiten/v2 v2.10.0-rc.3/go.mod h1:zWLx1Co8jVPhgY2X5QYkTqU+S8V8mfBLIOJMWJuT9sY=
+github.com/hajimehoshi/ebiten/v2 v2.10.4 h1:9O8C98SB605F7gs8MHQQZIHTVpgIvatgdd19VCY6ZPg=
+github.com/hajimehoshi/ebiten/v2 v2.10.4/go.mod h1:47QNgyS/y2ZRkjVUvlGLx8a+F7MSjcn8/GsjcCZ9Rc8=
 github.com/kisielk/errcheck v1.20.0 h1:9rwHBNKzd4wkDWcROy3DvFGNqEPlkxBg305rvk7HabI=
 github.com/kisielk/errcheck v1.20.0/go.mod h1:O+f80MKNwX8Oor2jwgpeQ9An7uJm+hRSgT+h22knRJU=
 github.com/pierrec/lz4/v4 v4.1.29 h1:CDQY6qZOLI4DW0Nx6R1vRrifrCeQHnNXkMb0hZWXFjg=