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

Bumps buildpack-deps from `61a02a8` to `9ff6778`.

---
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@sha256:61a02a85f7bd808d46ba3bd1dd757f277dc3026c68497a61d40c954ae277519a
+FROM buildpack-deps:noble-curl@sha256:9ff67781dddb972b855422092ca16f1bcd94c2a254aa557199bca87d2a87f406
 
 RUN apt-get update \
     && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \