fix: supported extensions not including default extensions [SKIP_CHANGELOG] (#373)

# Summary
fixes regression introduced in
#366 which caused the
default extensions not to be correctly populated

Author: makspll

crates/bevy_mod_scripting_core/src/asset.rs

@@ -148,7 +148,7 @@ impl Default for ScriptAssetSettings {
                 ("rhai", Language::Rhai),
                 ("rn", Language::Rune),
             ]),
-            supported_extensions: &[],
+            supported_extensions: &["lua", "luau", "rhai", "rn"],
         }
     }
 }