build(deps): bump docker/bake-action from 2 to 4

Bumps [docker/bake-action](https://github.com/docker/bake-action) from 2 to 4.
- [Release notes](https://github.com/docker/bake-action/releases)
- [Commits](https://github.com/docker/bake-action/compare/v2...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/build.yml

@@ -114,7 +114,7 @@ jobs:
 
       -
         name: Build artifacts
-        uses: docker/bake-action@v2
+        uses: docker/bake-action@v4
         with:
           targets: artifact-all
       -
@@ -130,7 +130,7 @@ jobs:
           if-no-files-found: error
       -
         name: Build image
-        uses: docker/bake-action@v2
+        uses: docker/bake-action@v4
         with:
           files: |
             ./docker-bake.hcl

.github/workflows/conformance.yml

@@ -22,7 +22,7 @@ jobs:
           fetch-depth: 0
       -
         name: Build image
-        uses: docker/bake-action@v2
+        uses: docker/bake-action@v4
         with:
           targets: image-local
       -

.github/workflows/docs.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Build docs
-        uses: docker/bake-action@v3
+        uses: docker/bake-action@v4
         with:
           files: |
             docker-bake.hcl

.github/workflows/e2e.yml

@@ -25,7 +25,7 @@ jobs:
           fetch-depth: 0
       -
         name: Build image
-        uses: docker/bake-action@v2
+        uses: docker/bake-action@v4
         with:
           targets: image-local
       -