Bump crazy-max/ghaction-docker-meta from v1 to v2.1.0

Bumps [crazy-max/ghaction-docker-meta](https://github.com/crazy-max/ghaction-docker-meta) from v1 to v2.1.0.
- [Release notes](https://github.com/crazy-max/ghaction-docker-meta/releases)
- [Changelog](https://github.com/crazy-max/ghaction-docker-meta/blob/master/CHANGELOG.md)
- [Commits](https://github.com/crazy-max/ghaction-docker-meta/compare/v1...72654174f7b8de453d12757cef7fa93774555cbd)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/release.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: crazy-max/ghaction-docker-meta@v1
+      - uses: crazy-max/ghaction-docker-meta@v2.1.0
         id: docker_meta
         with:
           images: oxigraph/oxigraph
@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: crazy-max/ghaction-docker-meta@v1
+      - uses: crazy-max/ghaction-docker-meta@v2.1.0
         id: docker_meta
         with:
           images: oxigraph/oxigraph-wikibase