docs: Force to use Julia 1.9 (#79)

* docs: Force to use Julia 1.9
* docs: Include doc for prepare_for_LWFBrook90R()

---------

Co-authored-by: Fabian Bernhard <[email protected]>

Author: fabern

.github/workflows/Documentation.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1
         with:
-          version: '1'
+          version: '1.9'
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-docdeploy@v1
         env:

docs/src/function-docs.md

@@ -21,7 +21,8 @@ Pages   = ["LWFBrook90.jl"]
 Modules = [LWFBrook90]
 Pages   = ["func_read_inputData.jl",
            "func_discretize_soil_domain.jl",
-           "func_postprocess.jl"]
+           "func_postprocess.jl",
+           "generate_LWFBrook90R_Input.jl"]
 ```
 
 ## Functions defining the DiffEq.jl system of ODE (p, u0, f, callbacks, ...)