Update LineEdit internal for hints

[IanButterworth]

Fixes JuliaLang/julia#57243

Missed this in JuliaLang/julia#57192

julia> a[1]┌ Error: Error in the keymap
│   exception =
│    UndefVarError: `check_for_hint` not defined in `REPL.LineEdit`
│    Suggestion: check for spelling errors or missing imports.
│    Stacktrace:
│     [1] getproperty
│       @ ./Base_compiler.jl:47 [inlined]
│     [2] (::REPLExt.var"#repl_init##0#repl_init##1"{REPL.LineEdit.Prompt})(::REPL.LineEdit.MIState, ::REPL.LineEditREPL, ::Vararg{Any})
│       @ REPLExt ~/.julia/juliaup/julia-nightly/share/julia/stdlib/v1.12/Pkg/ext/REPLExt/REPLExt.jl:184
│     [3] #invokelatest#1
│       @ ./essentials.jl:1057 [inlined]
│     [4] invokelatest
│       @ ./essentials.jl:1053 [inlined]
│     [5] (::REPL.LineEdit.var"#match_input##0#match_input##1"{REPLExt.var"#repl_init##0#repl_init##1"{REPL.LineEdit.Prompt}, String})(s::Any, p::Any)
│       @ REPL.LineEdit ~/.julia/juliaup/julia-nightly/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:1794
│     [6] macro expansion
│       @ ~/.julia/juliaup/julia-nightly/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2944 [inlined]
│     [7] macro expansion
│       @ ./lock.jl:376 [inlined]
│     [8] (::REPL.LineEdit.var"#prompt!##2#prompt!##3"{REPL.Terminals.TTYTerminal, REPL.LineEdit.ModalInterface, REPL.LineEdit.MIState, REPL.LineEdit.Prompt})()
│       @ REPL.LineEdit ~/.julia/juliaup/julia-nightly/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2933
└ @ REPL.LineEdit ~/.julia/juliaup/julia-nightly/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2946