As long as the quick release moved okay when it was on the vise I wouldn’t mess around with it.
The spring just provides tension, as long as the bar doesn’t catch on it you should be fine.
If it is catching i would try to source a replacement rather than try to heat up and bend the one you have.
I’ve had no luck reshaping those springs.
There are some for sale on eBay UK at the moment.
I’ve restored a few of these vises, they are great. If anyone reading this is looking for one I have a fully restored 1940s 52 1/2 for sale at the moment!