chore(deps): bump alpine from 3.20.3 to 3.21.0

Bumps alpine from 3.20.3 to 3.21.0.

---
updated-dependencies:
- dependency-name: alpine
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Dockerfile

@@ -5,7 +5,7 @@ COPY . /app
 RUN go mod download
 RUN go build ./cmd/katana
 
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 RUN apk add --no-cache bind-tools ca-certificates chromium
 COPY --from=builder /app/katana /usr/local/bin/