build(deps): bump buildpack-deps in /images/src/ubuntu-base

Bumps buildpack-deps from `77996a9` to `91ef357`.

---
updated-dependencies:
- dependency-name: buildpack-deps
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

images/src/ubuntu-base/Dockerfile

@@ -1,4 +1,4 @@
-FROM buildpack-deps:noble-curl@sha256:77996a99be212be2be1c121960fca37fc891247b1266b604662c50bddcf89372
+FROM buildpack-deps:noble-curl@sha256:91ef35765e02629e169edf1e4b2f66644f6169da5bdace2ecbf1d676bf15ec20
 
 RUN apt-get update \
     && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \