Set DNS for snowflake.torproject.net to snowflake-01 host

For the past few weeks, the Snowflake bridge has been running on an interim server, while waiting for a permanent server to be set up (tpo/anti-censorship/pluggable-transports/snowflake#40110 (closed)). The permanent server is now set up (tpo/anti-censorship/pluggable-transports/snowflake#40111 (closed)), and we will need the DNS records for snowflake.torproject.net changed to point to it. This is the last DNS change for snowflake.torproject.net we expect to need for the foreseeable future.

If possible, I'd like to schedule the DNS change to happen next Monday, 11 April after 15:00 UTC. As usual, I will be present in #tor-dev and #tpo-admin to respond to any problems.

Previous DNS change tickets: #40598 (closed) #40602 (closed) #40664 (closed).

/cc @linus