Add back mistakenly deleted sarafu-token version

apps/contract-migration/docker/Dockerfile

@@ -60,6 +60,7 @@ ARG pip_extra_index_url=https://pip.grassrootseconomics.net:8433
 ARG cic_base_version=0.1.2a77
 ARG cic_eth_version=0.11.0b6
 ARG sarafu_faucet_version=0.0.2a28
+ARG sarafu_token_version==0.0.1a6
 ARG cic_contracts_version=0.0.2a2
 RUN pip install --user --extra-index-url $pip_extra_index_url cic-base[full_graph]==$cic_base_version \
 	cic-eth==$cic_eth_version \