fix zizmor findings

.github/workflows/validate.yml

@@ -4,7 +4,6 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
-# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions
 permissions:
   contents: read
 
@@ -21,15 +20,15 @@ jobs:
   prepare:
     runs-on: ubuntu-latest
     outputs:
-      targets: ${{ steps.generate.outputs.targets }}
+      matrix: ${{ steps.generate.outputs.matrix }}
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       -
-        name: List targets
+        name: Generate matrix
         id: generate
-        uses: docker/bake-action/subaction/list-targets@v6
+        uses: docker/bake-action/subaction/matrix@82490499d2e5613fcead7e128237ef0b0ea210f7 # v7.0.0
         with:
           target: validate
 
@@ -40,10 +39,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        target: ${{ fromJson(needs.prepare.outputs.targets) }}
+        include: ${{ fromJson(needs.prepare.outputs.matrix) }}
     steps:
       -
         name: Validate
-        uses: docker/bake-action@v6
+        uses: docker/bake-action@82490499d2e5613fcead7e128237ef0b0ea210f7 # v7.0.0
         with:
           targets: ${{ matrix.target }}