Docs: @lock is missing a compat version note

[IanButterworth]

julia/base/lock.jl

Lines 248 to 263 in 5b6a94d

	"""
	@lock l expr
	Macro version of `lock(f, l::AbstractLock)` but with `expr` instead of `f` function.
	Expands to:
	```julia
	lock(l)
	try
	expr
	finally
	unlock(l)
	end
	```
	This is similar to using [`lock`](@ref) with a `do` block, but avoids creating a closure
	and thus can improve the performance.
	"""

[IanButterworth]

It was added in Julia 1.3 but only exported in 1.10