build(deps): bump ubuntu in /tools/ubuntu-cross

Bumps ubuntu from `9cbed75` to `590e57a`.

---
updated-dependencies:
- dependency-name: ubuntu
  dependency-version: noble
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tools/ubuntu-cross/Dockerfile

@@ -1,5 +1,5 @@
 FROM --platform=${BUILDPLATFORM} tonistiigi/xx:master@sha256:7d5cbcc2c24fd4af0b555e51e7ff7282aad6d8a56275e06681a209237fd0becd AS xx
-FROM --platform=${BUILDPLATFORM} ubuntu:noble@sha256:9cbed754112939e914291337b5e554b07ad7c392491dba6daf25eef1332a22e8 AS build
+FROM --platform=${BUILDPLATFORM} ubuntu:noble@sha256:590e57acc18d58cd25d00254d4ca989bbfcd7d929ca6b521892c9c904c391f50 AS build
 COPY --from=xx / /
 
 RUN <<EOF