Draft release notes for 3.5.1

[ctb]

created from git log --oneline v3.5.0..stable.

Feature deprecations

• add deprecation warning for sourmash compute --input-is-10x ( [MRG] Deprecations for next 3.5.x release, in support of 4.0 release #1326)
• add warnings about new sourmash lca summarize behavior ( [MRG] Deprecations for next 3.5.x release, in support of 4.0 release #1326)
• add warning for new behavior of MinHash.merge(...) ( [MRG] Deprecations for next 3.5.x release, in support of 4.0 release #1326)
• add deprecation warning for TarStorage ([MRG] Deprecate TarStorage #1165)

Infrastructure and CI changes:

• Backport github actions to stable branch (3.5.x) ([MRG] backport github actions to stable branch (3.5.x) #1317)

[ctb]

released!