Bump debian

Bumps debian from testing-20240211-slim to testing-20240311-slim.

---
updated-dependencies:
- dependency-name: debian
  dependency-type: direct:production
...

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

src/test/resources/org/jvnet/hudson/plugins/platformlabeler/debian/testing/Dockerfile

@@ -1,2 +1,2 @@
-FROM debian:testing-20240211-slim
+FROM debian:testing-20240311-slim
 RUN apt-get update && apt-get dist-upgrade -y && apt-get install -y lsb-release