fix(ci): use recursive glob so Linux release assets attach to tag (#46)

`tauri build --target x86_64-unknown-linux-gnu` writes `.deb` to a
`deb/` subdir and `.AppImage` to an `appimage/` subdir. `actions/upload-artifact@v4`
preserves that nesting, so after `download-artifact`, the Linux files
live at `artifacts/codex-switch-linux-x86_64/deb/*.deb` and
`.../appimage/*.AppImage`. The previous one-level glob
`artifacts/codex-switch-linux-x86_64/*` did not match anything; v1.5.11
tag build logged `Pattern '...' does not match any files.` and the
Linux artifacts were silently missing from the release while the
build job reported success.

Switch all four platform globs to `**/*` so they recurse. macOS/Windows
already flatten to a single level, so the change is a no-op for them.

Author: Cmochance

.github/workflows/build.yml

@@ -182,7 +182,7 @@ jobs:
           draft: true
           generate_release_notes: true
           files: |
-            artifacts/codex-switch-macos-arm64/*
-            artifacts/codex-switch-macos-x64/*
-            artifacts/codex-switch-windows-x86_64/*
-            artifacts/codex-switch-linux-x86_64/*
+            artifacts/codex-switch-macos-arm64/**/*
+            artifacts/codex-switch-macos-x64/**/*
+            artifacts/codex-switch-windows-x86_64/**/*
+            artifacts/codex-switch-linux-x86_64/**/*