Bump docker/bake-action from 3 to 4

Bumps [docker/bake-action](https://github.com/docker/bake-action) from 3 to 4.
- [Release notes](https://github.com/docker/bake-action/releases)
- [Commits](docker/bake-action@v3...v4)

---
updated-dependencies:
- dependency-name: docker/bake-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/test.yml

@@ -20,7 +20,7 @@ jobs:
         uses: actions/checkout@v4
       -
         name: Test
-        uses: docker/bake-action@v3
+        uses: docker/bake-action@v4
         with:
           targets: test
       -

.github/workflows/validate.yml

@@ -40,6 +40,6 @@ jobs:
         uses: actions/checkout@v4
       -
         name: Validate
-        uses: docker/bake-action@v3
+        uses: docker/bake-action@v4
         with:
           targets: ${{ matrix.target }}