Update README.md to reflect current release version

[jslpc]

When installing by clicking the link in the README, the version installed is no longer up to date.

When I downloaded it, it installed just fine, but couldn't download from YouTube once it finished gathering information about the link provided, and I think it was due to not having all of the dependencies. I checked here again and realized I was on an earlier version, and the version I just installed (0.7) has a button for installing those dependencies thankfully.

Just thought it might be confusing for first time users who may think it just doesn't work. I'm stuck installing the dependencies now, which is taking a few minutes but I'm guessing will work fine, but if that doesn't let me download either I'll edit this issue with an update.

[Kevin-De-Koninck]

I'll update the install process a bit more, maybe tomorrow if I find some time to do it. Thanks!