docs: try using older versions

docs/run_single_tutorial.jl

@@ -10,13 +10,30 @@ output_directory = ARGS[2]
 path = ARGS[3]
 
 io = open(pkg_log_path, "w")
-Pkg.develop(; path=joinpath(@__DIR__, ".."), io)
+warn_old_version = try
+ Pkg.develop(; path=joinpath(@__DIR__, ".."), io)
+ false
+catch err
+ err isa Pkg.Resolve.ResolverError || rethrow()
+ @warn "Failed to install the latest version of Lux.jl. This is possible when the \
+ downstream packages haven't been updated to support latest releases yet."
+ true
+end
 Pkg.instantiate(; io)
 close(io)
 
 using Literate
 
 function preprocess(path, str)
+ if warn_old_version
+ st = """
+ !!! danger "Using older version of Lux.jl"
+
+ This tutorial cannot be run on the latest Lux.jl release due to downstream
+ packages not being updated yet.
+
+ \n\n""" * str
+ end
  new_str = replace(str, "__DIR = @__DIR__" => "__DIR = \"$(dirname(path))\"")
  appendix_code = """
  # ## Appendix