Update v1 tag whenever a v1.x version is released

[sethidden]

You can see how the official GitHub actions do it: https://github.com/actions/checkout/tags

When v4.1.3 was released, the v4 tag was also updated. This means that people that write "actions/checkout@v4" in their .yml will always use the latest version.

Currently in ggshield action I have written v1.22.0 so each time a new version is released I need to manually update the minor version number. I'd like to just write ggshield-action@v1 and always get the latest minor patch version. Currently @v1.0.0 (which is different than @v1 btw) points to an old version https://github.com/GitGuardian/ggshield-action/releases/tag/v1.0.0

I could just of course write ggshield-action@main but I don't want to be that bleeding edge :P

[askpatrickw]

Please do this.

[agateau-gg]

Agreed, that makes sense. Going to see how we can fit this in our upcoming sprints.