relax type specification in the generic __normalize! (JuliaLang#41045)

Author: GiggleLiu

stdlib/LinearAlgebra/src/generic.jl

@@ -1724,7 +1724,7 @@ function normalize!(a::AbstractArray, p::Real=2)
     __normalize!(a, nrm)
 end
 
-@inline function __normalize!(a::AbstractArray, nrm::AbstractFloat)
+@inline function __normalize!(a::AbstractArray, nrm::Real)
     # The largest positive floating point number whose inverse is less than infinity
     δ = inv(prevfloat(typemax(nrm)))