chore(deps): update ubuntu:24.04 docker digest to a08e551 (#249)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

validator/Dockerfile

@@ -22,7 +22,7 @@ COPY --from=build /otel_config_validator /otel_config_validator
 
 ENTRYPOINT ["/otel_config_validator"]
 
-FROM ubuntu:24.04@sha256:c4570d2f4665d5d118ae29fb494dee4f8db8fcfaee0e37a2e19b827f399070d3 AS shelltest
+FROM ubuntu:24.04@sha256:a08e551cb33850e4740772b38217fc1796a66da2506d312abe51acda354ff061 AS shelltest
 
 ENV YQ_VERSION="v4.45.1"