build: Bump docker/build-push-action from 2.7.0 to 2.8.0 (#27)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v2.7.0...v2.8.0)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
 
       - id: "docker_build"
         name: "Build Docker image"
-        uses: "docker/build-push-action@v2.7.0"
+        uses: "docker/build-push-action@v2.8.0"
         with:
           builder: "${{ steps.buildx.outputs.name }}"
           context: "./"
@@ -98,7 +98,7 @@ jobs:
 
       - id: "docker_build"
         name: "Build & push Docker image"
-        uses: "docker/build-push-action@v2.7.0"
+        uses: "docker/build-push-action@v2.8.0"
         with:
           builder: "${{ steps.buildx.outputs.name }}"
           context: "./"