message: Update hackatom build command
diff: @@ -18,7 +18,7 @@ To rebuild the test contract, go to the repo root and do
  ```sh
  docker run --rm -v "$(pwd)":/code \
  - --mount type=volume,source=$(basename "$(pwd)")_cache,target=/code/target \
  + --mount type=volume,source="$(basename "$(pwd)")_cache",target=/code/target \
  --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
  confio/cosmwasm-opt:0.7.3 ./contracts/hackatom
  cp contracts/hackatom/contract.wasm packages/vm/testdata/contract_0.8.wasm
  