Fix Dockerfile: use main branch instead of non-existent tag

The mainnet-v1.40.1 tag doesn't exist in Sui repo. Using main branch
which is stable and contains the Move compiler we need.

Author: forefy

api/Dockerfile

@@ -31,7 +31,7 @@ WORKDIR /api/move_parser_wrapper
 COPY move_parser_wrapper .
 
 # Clone Sui Move compiler (vendored dependency for building)
-RUN git clone --depth 1 --branch mainnet-v1.40.1 https://github.com/MystenLabs/sui.git /tmp/sui \
+RUN git clone --depth 1 https://github.com/MystenLabs/sui.git /tmp/sui \
     && mv /tmp/sui/external-crates/move /api/move-vendored \
     && rm -rf /tmp/sui