Fix: Updater signer failed signing file without extension (#14713)

* fixing bug where updater signer failed signing file withou extension

* removing  unnecessary unwrap()

* Adding change file. Removing commnent. Adding TODO.

* Apply suggestions from code review

---------

Co-authored-by: Wuelfhis Asuaje <wasuaje@shorecg.com>
Co-authored-by: Tony <68118705+Legend-Master@users.noreply.github.com>

Author: 3 people

.changes/updater-signer-files-without-extension.md

@@ -0,0 +1,6 @@
+---
+tauri-cli: patch:bug
+"@tauri-apps/cli": patch:bug
+---
+
+`tauri signer sign` doesn't work for files without an extension

crates/tauri-cli/src/helpers/updater_signature.rs

@@ -120,9 +120,14 @@ where
 {
   let bin_path = bin_path.as_ref();
   // We need to append .sig at the end it's where the signature will be stored
-  let mut extension = bin_path.extension().unwrap().to_os_string();
-  extension.push(".sig");
-  let signature_path = bin_path.with_extension(extension);
+  // TODO: use with_added_extension when we bump MSRV to > 1.91'
+  let signature_path = if let Some(ext) = bin_path.extension() {
+    let mut extension = ext.to_os_string();
+    extension.push(".sig");
+    bin_path.with_extension(extension)
+  } else {
+    bin_path.with_extension("sig")
+  };
 
   let trusted_comment = format!(
     "timestamp:{}\tfile:{}",