Apply suggestion from @vchuravy

Co-authored-by: Valentin Churavy <[email protected]>

Author: Keno

base/scopedvalues.jl

@@ -12,6 +12,9 @@ Abstract base type for scoped values that propagate values across
 dynamic scopes. All scoped value types must extend this abstract type.
 
 See also: [`ScopedValue`](@ref), [`LazyScopedValue`](@ref)
+
+!!! compat "Julia 1.13"
+    AbstractScopedValue requires Julia 1.13+.
 """
 abstract type AbstractScopedValue{T} end