Prep for v1.40.1

[odow]

Basic

• version field of Project.toml has been updated
  - If a breaking change, increment the MAJOR field and reset others to 0
  - If adding new features, increment the MINOR field and reset PATCH to 0
  - If adding bug fixes or documentation changes, increment the PATCH field

Documentation

• Add a new entry to docs/src/changelog.md, following existing style

Tests

• https://github.com/jump-dev/MathOptInterface.jl/actions/runs/15103076298
  • PolyJuMP: known incompatibility
  • SumOfSquares: known incompatibility
  • BilevelJuMP: Relax MOI.TimeLimitSec in the tests joaquimg/BilevelJuMP.jl#221
  • CATruustRegionMethod: looks like a flakey convergence issue
  • Clarabel: Update GitHub action scripts oxfordcontrol/Clarabel.jl#198
  • Manopt: QuadraticModels@0.9.10 is broken JuliaSmoothOptimizers/QuadraticModels.jl#155
  • Percival: QuadraticModels@0.9.10 is broken JuliaSmoothOptimizers/QuadraticModels.jl#155
• If new tests were added, ensure that MOI.Test.version_added is implemented.

[odow]

Merging because this is a pretty minor release and it will simplify jump-dev/JuMP.jl#3986 which has been dragging for too long.