fix zizmor findings

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

.github/workflows/validate.yml

@@ -1,5 +1,8 @@
 name: validate
 
+permissions:
+  contents: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
@@ -19,11 +22,11 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       -
         name: Generate matrix
         id: generate
-        uses: docker/bake-action/subaction/matrix@v7
+        uses: docker/bake-action/subaction/matrix@82490499d2e5613fcead7e128237ef0b0ea210f7 # v7.0.0
         with:
           target: validate
 
@@ -38,6 +41,6 @@ jobs:
     steps:
       -
         name: Validate
-        uses: docker/bake-action@v7
+        uses: docker/bake-action@82490499d2e5613fcead7e128237ef0b0ea210f7 # v7.0.0
         with:
           targets: ${{ matrix.target }}