docs(collectibles): fix readme
Fix readme instructions
```bash
# run a tari_console_wallet with grpc on port 18143
+# run a base node with grpc on port 18142
+# run a validator node with grpc on port 18144
# ...
# then in `tari_collectibles/web-app/`
npm i
+npm run build
-# in `tari_collectibles/`
-cargo install tauri-cli --version "^1.0.0-beta"
-npm i
-
-npm start # npm run tauri dev
+#Then in root
+cargo run --bin tari_collectibles
-# dev cycle: https://tauri.studio/en/docs/usage/development/development
```
