update bake-action to v6

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

README.md

@@ -206,9 +206,6 @@ jobs:
   docker:
     runs-on: ubuntu-latest
     steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v4
       -
         name: Docker meta
         id: meta
@@ -224,11 +221,11 @@ jobs:
             type=sha
       -
         name: Build
-        uses: docker/bake-action@v5
+        uses: docker/bake-action@v6
         with:
           files: |
             ./docker-bake.hcl
-            ${{ steps.meta.outputs.bake-file }}
+            cwd://${{ steps.meta.outputs.bake-file }}
           targets: build
 ```
 
@@ -271,29 +268,12 @@ similar to the previous one:
 ```yaml
       -
         name: Build
-        uses: docker/bake-action@v5
+        uses: docker/bake-action@v6
         with:
           files: |
             ./docker-bake.hcl
-            ${{ steps.meta.outputs.bake-file-tags }}
-            ${{ steps.meta.outputs.bake-file-labels }}
-          targets: build
-```
-
-If you're building a [remote Bake definition](https://docs.docker.com/build/bake/remote-definition/)
-using a [Git context](https://github.com/docker/bake-action?tab=readme-ov-file#git-context),
-you must specify the location of the metadata-only bake file using a `cwd://`
-prefix:
-
-```yaml
-      -
-        name: Build
-        uses: docker/bake-action@v5
-        with:
-          source: "${{ github.server_url }}/${{ github.repository }}.git#${{ github.ref }}"
-          files: |
-            ./docker-bake.hcl
-            cwd://${{ steps.meta.outputs.bake-file }}
+            cwd://${{ steps.meta.outputs.bake-file-tags }}
+            cwd://${{ steps.meta.outputs.bake-file-labels }}
           targets: build
 ```
 
@@ -1008,12 +988,12 @@ The same can be done with the [`bake-action`](https://github.com/docker/bake-act
           images: name/app
       -
         name: Build
-        uses: docker/bake-action@v5
+        uses: docker/bake-action@v6
         with:
           files: |
             ./docker-bake.hcl
-            ${{ steps.meta.outputs.bake-file-tags }}
-            ${{ steps.meta.outputs.bake-file-annotations }}
+            cwd://${{ steps.meta.outputs.bake-file-tags }}
+            cwd://${{ steps.meta.outputs.bake-file-annotations }}
           targets: build
 ```