Update salsa to pull in fixpoint fixes

[MichaReiser]

Pull in salsa-rs/salsa#836 to get some fixpoint fixes.

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

Formatter (stable)

ℹ️ ecosystem check encountered format errors. (no format changes; 1 project error)

mesonbuild/meson-python (error)

warning: Detected debug build without --no-cache.
error: Failed to read tests/packages/symlinks/baz.py: No such file or directory (os error 2)
error: Failed to read tests/packages/symlinks/qux.py: No such file or directory (os error 2)

Formatter (preview)

ℹ️ ecosystem check encountered format errors. (no format changes; 1 project error)

mesonbuild/meson-python (error)

ruff format --preview

warning: Detected debug build without --no-cache.
error: Failed to read tests/packages/symlinks/baz.py: No such file or directory (os error 2)
error: Failed to read tests/packages/symlinks/qux.py: No such file or directory (os error 2)