chore(bundler): apply nitpick and add a change file.

Author: chfaft

.changes/support-template-extensions.md

@@ -0,0 +1,5 @@
+---
+tauri-bundler: minor:feat
+---
+
+Consider extensions that are defined in the wxs template.

crates/tauri-bundler/src/bundle/windows/msi/mod.rs

@@ -759,8 +759,8 @@ pub fn build_wix_app_installer(
 
   let current_dir = std::env::current_dir()?;
   let extension_regex = Regex::new("\"http://schemas.microsoft.com/wix/(\\w+)\"")?;
-  let input_paths = std::iter::once(output_path.join(PathBuf::from("main.wxs")))
-    .chain(fragment_paths.iter().map(|p| current_dir.join(p)));
+  let input_paths =
+    std::iter::once(main_wxs_path).chain(fragment_paths.iter().map(|p| current_dir.join(p)));
 
   for input_path in input_paths {
     let input_content = fs::read_to_string(&input_path)?;