fix build.sh script (#574)

target_chains/cosmwasm/build.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 docker run --rm -v "$(pwd)":/code \
-  -v $(cd ../../third_party; pwd):/third_party \
+  -v $(cd ../../wormhole_attester; pwd):/wormhole_attester \
   --mount type=volume,source="$(basename "$(pwd)")_cache",target=/code/target \
   --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
   cosmwasm/workspace-optimizer:0.12.11