CompatHelper: add new compat entry for Literate at version 2 for pack…

…age docs, (keep existing compat) (#1500)

Co-authored-by: CompatHelper Julia <compathelper_noreply@julialang.org>
Co-authored-by: Valentin Churavy <vchuravy@users.noreply.github.com>

docs/Project.toml

@@ -4,4 +4,5 @@ Literate = "98b081ad-f1c9-55d3-8b20-4c87d4299306"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
+Literate = "2"
 Documenter = "0.27.8, 1"