fix(ci): switch release-please to simple mode for Cargo workspace compatibility

Cargo workspace with `version.workspace = true` in member crates is not
supported by release-please's rust mode. Switch to simple mode with
extra-files to update workspace.package.version in root Cargo.toml
and tauri.conf.json version.

Author: us

release-please-config.json

@@ -1,16 +1,9 @@
 {
   "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
-  "release-type": "rust",
+  "release-type": "simple",
   "bump-minor-pre-major": true,
   "bump-patch-for-minor-pre-major": true,
   "include-component-in-tag": false,
-  "extra-files": [
-    {
-      "type": "json",
-      "path": "tauri/tauri.conf.json",
-      "jsonpath": "$.version"
-    }
-  ],
   "changelog-sections": [
     { "type": "feat", "section": "Features" },
     { "type": "fix", "section": "Bug Fixes" },
@@ -22,6 +15,19 @@
     { "type": "ci", "section": "CI", "hidden": true }
   ],
   "packages": {
-    ".": {}
+    ".": {
+      "extra-files": [
+        {
+          "type": "toml",
+          "path": "Cargo.toml",
+          "jsonpath": "$.workspace.package.version"
+        },
+        {
+          "type": "json",
+          "path": "tauri/tauri.conf.json",
+          "jsonpath": "$.version"
+        }
+      ]
+    }
   }
 }