Fix documentation environment compatibility (#139)

Co-authored-by: ChrisRackauckas-Claude <accounts@chrisrackauckas.com>

Author: ChrisRackauckas-Claude

docs/Project.toml

@@ -4,4 +4,4 @@ RuntimeGeneratedFunctions = "7e49a35a-f44a-4d26-94aa-eba1b4ca6b47"
 
 [compat]
 Documenter = "1"
-RuntimeGeneratedFunctions = "0.6"
+RuntimeGeneratedFunctions = "0.5"