v0.44.6

AbstractAlgebra v0.44.6

Diff since v0.44.5

Merged pull requests:

• Import more ConformanceTests stuff into TestExt (#1978) (@fingolfin)
• Create dependabot.yml (#1984) (@ranocha)
• Bump codecov/codecov-action from 4 to 5 (#1987) (@dependabot[bot])
• Explicitely import Base.Matrix (#1988) (@lgoettgens)
• OscarCI: try testing oscar master with released Nemo+Hecke+Singular (#1990) (@lgoettgens)
• Add is_zero(::NCRing) as an alias of is_trivial (#1991) (@emikelsons)
• Simplify and slightly optimize vars(::MPolyRingElem) (#1994) (@fingolfin)
• feat: add some missing rational function field functionality (#1995) (@thofma)
• chore: bump to 0.44.6 (#1997) (@thofma)