Bump crazy-max/ghaction-docker-meta from 3.8.0 to 4.0.1

Bumps [crazy-max/ghaction-docker-meta](https://github.com/crazy-max/ghaction-docker-meta) from 3.8.0 to 4.0.1.
- [Release notes](https://github.com/crazy-max/ghaction-docker-meta/releases)
- [Upgrade guide](https://github.com/docker/metadata-action/blob/master/UPGRADE.md)
- [Commits](docker/metadata-action@v3.8.0...v4.0.1)

---
updated-dependencies:
- dependency-name: crazy-max/ghaction-docker-meta
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/main.yml

@@ -25,13 +25,15 @@ jobs:
       -
         name: Docker meta
         id: docker_meta
-        uses: crazy-max/ghaction-docker-meta@v3.8.0
+        uses: docker/metadata-action@v4.0.1
         with:
           # list of Docker images to use as base name for tags
           images: |
             khalibre/privacyidea
           # add git short SHA as Docker tag
-          tag-sha: true
+          tags: |
+            # minimal (short sha)
+            type=sha
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v2

.github/workflows/pr.yml

@@ -25,13 +25,15 @@ jobs:
       -
         name: Docker meta
         id: docker_meta
-        uses: crazy-max/ghaction-docker-meta@v3.8.0
+        uses: docker/metadata-action@v4.0.1
         with:
           # list of Docker images to use as base name for tags
           images: |
             khalibre/privacyidea
           # add git short SHA as Docker tag
-          tag-sha: true
+          tags: |
+            # minimal (short sha)
+            type=sha
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v2