Add sdl3 to content (#594)

Co-authored-by: Joe Clay <[email protected]>
Co-authored-by: Mischa Spiegelmock <[email protected]>

Author: 3 people

content/ecosystem/data.toml

@@ -1323,6 +1323,11 @@ name = "sdl2"
 source = "crates"
 categories = ["2drendering", "audio", "engines", "textrendering", "input", "windowing"]
 
+[[items]]
+name = "sdl3"
+source = "crates"
+categories = ["2drendering", "audio", "engines", "3drendering", "input", "windowing"]
+
 [[items]]
 name = "sfml"
 source = "crates"