fix zizmor findings

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

.github/workflows/validate.yml

@@ -4,6 +4,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 on:
   workflow_dispatch:
   push:
@@ -21,11 +24,11 @@ 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
 
@@ -40,6 +43,6 @@ jobs:
     steps:
       -
         name: Validate
-        uses: docker/bake-action@v7
+        uses: docker/bake-action@82490499d2e5613fcead7e128237ef0b0ea210f7 # v7.0.0
         with:
           targets: ${{ matrix.target }}