draft release notes for v4.4.3

[ctb]

based on git log --oneline v4.4.2..latest -

Minor new features:

• use and report ANI from tax genome summarization ([MRG] use and report ANI from tax genome summarization #2005)

Performance improvements:

• avoid instantiating a hashes class ([MRG] speed up prefetch by adjusting calls to use len(minhash) #2132)

Cleanup and documentation fixes:

• update various descriptions to talk about k-mers, not just DNA ([MRG] update various descriptions to talk about k-mers, not just DNA #2137)

Developer updates:

• fix docs building for pip 22.2 ([MRG] fix docs building for pip 22.2 #2143)
• change dependabot rebase-strategy to disabled for rust dependencies ([MRG] change rebase-strategy to disabled for rust dependencies #2142)
• Rust deps and nix flakes updates (Rust deps and nix flakes updates #2141)
• add pytest-xdist and -n4 to pytest and tox configs ([MRG] add pytest-xdist and -n4 to pytest and tox configs #2138)
• update release instructions after v4.4.2 ([MRG] update release instructions after v4.4.2 #2131)

[ctb]

• PyPI page updated
• Zenodo DOI successfully minted upon new github release - see search results
• pip install sourmash installs the correct version
• mamba create -n smash-release -y sourmash installs the correct version

[ctb]

v4.4.3 is released! 🎉