update github actions.

[fcaps]

closes #446

Some minor changes besides the update:

1. Images are now including labels (docker inspect faforever/faf-website:develop)

"Labels": {
                "org.opencontainers.image.created": "2023-11-07T20:09:31.934Z",
                "org.opencontainers.image.description": "FAForever's Website",
                "org.opencontainers.image.licenses": "MIT",
                "org.opencontainers.image.revision": "7a0e6f561a01a1a8f6194958209c6470b6458dac",
                "org.opencontainers.image.source": "https://github.com/fcaps/website",
                "org.opencontainers.image.title": "website",
                "org.opencontainers.image.url": "https://github.com/fcaps/website",
                "org.opencontainers.image.version": "develop"
            }

2. Concurrency disabled, actions run once for every PR, branch or tag
3. Option enabled to run this action also in the fork with vars.DOCKER_ORG