fix(ci): generate the bootstrap installer icons before cargo test

tauri::generate_context! embeds the icons at compile time and they are no
longer committed, so the lane failed on a missing 32x32.png.

.github/workflows/rust-tests.yml

@@ -38,6 +38,18 @@ jobs:
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
+      # tauri::generate_context! embeds the app icons, which are generated,
+      # not committed.
+      - uses: ./.github/actions/setup-pm
+        with:
+          toolchain: all
+          cache-python: true
+          prune-python-cache: true
+
+      - name: Generate icons
+        working-directory: .
+        run: node scripts/generate-icons.mjs
+
       # Tauri links against the system webkit2gtk on Linux, so the crate does
       # not compile without these even for `cargo test --lib`.
       - name: Install Tauri system dependencies