Updates to steps taking some time to reflect in validation

[aedwards9]

When the step implementation files are updated (e.g. via a git pull) it can sometimes take a little while for the Gauge VSCode plugin to pick up the new steps and thus can sometimes show errors in a specification (saying the step is invalid) when it isn't. This normally resolves itself eventually but I wondered if there is a way to "force" this to happen. I think normally closing/opening code works but would be nice to have something quicker. I'm not sure how the validation is happening behind the scenes but is there a way I can force it to reset / re-validate within the VSCode?