Update RData requirement to 1.1.0 in /docs

Updates the requirements on [RData](https://github.com/JuliaData/RData.jl) to permit the latest version.
- [Release notes](https://github.com/JuliaData/RData.jl/releases)
- [Changelog](https://github.com/JuliaData/RData.jl/blob/main/NEWS.md)
- [Commits](JuliaData/RData.jl@v0.0.1...v1.1.0)

---
updated-dependencies:
- dependency-name: RData
  dependency-version: 1.1.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/Project.toml

@@ -18,5 +18,6 @@ DataFrames = "1.8.1"
 Documenter = "1.16.1"
 Latexify = "0.16.10"
 Plots = "1.41.3"
+RData = "1.1.0"
 StatsPlots = "0.15.8"
 Suppressor = "0.2.8"