Limit reshim to current Ruby version

[theodorton]

If you have a lot of ruby versions installed, the reshim in:

asdf-ruby/rubygems-plugin/rubygems_plugin.rb

Lines 2 to 7 in 6b1e7ea

	def install(options)
	super
	# We don't know which gems were installed, so always reshim.
	`asdf reshim ruby`
	end
	end

that is triggered on every bundle update - can get really slow:

$ time asdf reshim ruby

________________________________________________________
Executed in   22.94 secs    fish           external
   usr time    7.65 secs  425.00 micros    7.65 secs
   sys time   10.64 secs  878.00 micros   10.64 secs

Limiting the reshim to the current version would make it orders of magnitude faster:

$ time asdf reshim ruby 3.4.5

________________________________________________________
Executed in    1.07 secs      fish           external
   usr time  380.67 millis  365.00 micros  380.31 millis
   sys time  474.90 millis  938.00 micros  473.97 millis

[theodorton]

Seems like there's an explanation for why here:
53114dd7