set timeout to 10s for signing cache blobs (default 3m)

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

Author: crazy-max

.github/workflows/bake.yml

@@ -405,6 +405,7 @@ jobs:
             # Sign with cosign
             cosign sign-blob \
               --yes \
+              --timeout 10s \
               --oidc-provider github-actions \
               --new-bundle-format \
               --use-signing-config \

.github/workflows/build.yml

@@ -364,6 +364,7 @@ jobs:
             # Sign with cosign
             cosign sign-blob \
               --yes \
+              --timeout 10s \
               --oidc-provider github-actions \
               --new-bundle-format \
               --use-signing-config \