[docker] remove quote around $seed in mint
[docker] remove quote around $seed in mint

This was a recommendation from a linter but it breaks mint. Perhaps the
better solution would be either to break this up into different
parameters.

Closes: #2255
Approved by: sausagee

libra/libra,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,aptos-labs/aptos-core,libra/libra,libra/libra