Update Plots requirement to 1.41.6 in /docs

Updates the requirements on [Plots](https://github.com/JuliaPlots/Plots.jl) to permit the latest version.
- [Release notes](https://github.com/JuliaPlots/Plots.jl/releases)
- [Changelog](https://github.com/JuliaPlots/Plots.jl/blob/v2/NEWS.md)
- [Commits](JuliaPlots/Plots.jl@Plots-v1.41.5+docs...Plots-v1.41.6)

---
updated-dependencies:
- dependency-name: Plots
  dependency-version: 1.41.6
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/Project.toml

@@ -11,3 +11,4 @@ DecisionFocusedLearningBenchmarks = "0.6.0"
 Documenter = "1.17.0"
 InferOpt = "0.7.2"
 Literate = "2.21.0"
+Plots = "1.41.6"