ci: remove fetch depth 0 for validate jobs

Signed-off-by: David Karlsson <david.karlsson@docker.com>
(cherry picked from commit 341c843ac2)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

.github/workflows/validate.yml

@@ -29,8 +29,6 @@ jobs:
       -
         name: Checkout
         uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
       -
         name: Run
         uses: docker/bake-action@v2
@@ -70,8 +68,6 @@ jobs:
       -
         name: Checkout
         uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
       -
         name: Run
         shell: 'script --return --quiet --command "bash {0}"'