ci: fix missing web dist folder

Signed-off-by: Henry Gressmann <mail@henrygressmann.de>

.github/workflows/test.yaml

@@ -15,6 +15,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
+      - run: mkdir ./web/dist
       - name: Run tests
         run: cargo test --all --all-features
       - name: Run clippy