Make ScopedValues public (#54574)

(cherry picked from commit ce4f090)

Author: LilithHafner

base/exports.jl

@@ -1080,6 +1080,7 @@ public
     Checked,
     Filesystem,
     Order,
+    ScopedValues,
     Sort,
 
 # Types

test/misc.jl

@@ -1540,7 +1540,7 @@ end
 @testset "Base docstrings" begin
     undoc = Docs.undocumented_names(Base)
     @test_broken isempty(undoc)
-    @test undoc == [:BufferStream, :CanonicalIndexError, :CapturedException, :Filesystem, :IOServer, :InvalidStateException, :Order, :PipeEndpoint, :Sort, :TTY]
+    @test undoc == [:BufferStream, :CanonicalIndexError, :CapturedException, :Filesystem, :IOServer, :InvalidStateException, :Order, :PipeEndpoint, :ScopedValues, :Sort, :TTY]
 end
 
 @testset "Base.Libc docstrings" begin