fix(feature/specta): Resolve error when using latest version of specta with tauri specta feature (#11871)

* Update specta feature to use latest specta version; add specta-util dependency (required in specta v2 rc.20)

* Add .changes file

* Update crates/tauri/Cargo.toml

---------

Co-authored-by: Lucas Fernandes Nogueira <lucas@tauri.app>

Author: johncarmack1984

.changes/specta-feature-fix.md

@@ -0,0 +1,5 @@
+---
+"tauri": patch:bug
+---
+
+Fix `specta-util` dependency not found error when using `specta` feature

Cargo.lock

@@ -85,11 +85,14 @@ tracing = { version = "0.1", optional = true }
 heck = "0.5"
 log = "0.4"
 dunce = "1"
-specta = { version = "^2.0.0-rc.16", optional = true, default-features = false, features = [
+specta = { version = "^2.0.0-rc.20", optional = true, default-features = false, features = [
   "function",
   "derive",
 ] }
-
+# TODO: remove when specta releases rc.21
+specta-util = { version = "^0.0.7", optional = true, default-features = false, features = [
+  "export",
+] }
 [target."cfg(any(target_os = \"linux\", target_os = \"dragonfly\", target_os = \"freebsd\", target_os = \"openbsd\", target_os = \"netbsd\", target_os = \"windows\", target_os = \"macos\"))".dependencies]
 muda = { version = "0.15", default-features = false, features = ["serde"] }
 tray-icon = { version = "0.19", default-features = false, features = [
@@ -192,7 +195,7 @@ config-toml = ["tauri-macros/config-toml"]
 image-ico = ["image/ico"]
 image-png = ["image/png"]
 macos-proxy = ["tauri-runtime-wry/macos-proxy"]
-specta = ["dep:specta"]
+specta = ["dep:specta", "dep:specta-util"]
 
 [[example]]
 name = "commands"