Astro version 2.2.2

Bug Fixes

• Fix ephemeris download failing with :failed_connect/:closed on OTP 26+, where Erlang offers TLS 1.3 by default but NASA NAIF's server has a broken TLS 1.3 handshake. Both mix astro.download_ephemeris and the runtime auto-downloader now pin to TLS 1.2 (the version curl already negotiates). Thanks to @allenwyma for the report. Closes #10.