build(deps): update DAQP requirement in /docs

Updates the requirements on [DAQP](https://github.com/darnstrom/DAQP.jl) to permit the latest version.
- [Release notes](https://github.com/darnstrom/DAQP.jl/releases)
- [Commits](https://github.com/darnstrom/DAQP.jl/commits/v0.9.2)

---
updated-dependencies:
- dependency-name: DAQP
  dependency-version: 0.9.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docs/Project.toml

@@ -13,7 +13,7 @@ Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 
 [compat]
 ControlSystemsBase = "1"
-DAQP = "0.6, 0.7.1"
+DAQP = "0.6, 0.7.1, 0.9"
 Documenter = "1"
 JuMP = "1"
 LinearAlgebra = "1.10"