deps: update docker.io/library/maven:3.9.9-eclipse-temurin-11-alpine docker digest to cdfb386 (#3418)

This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | docker.io/library/maven | stage | digest | `006d255` -> `cdfb386` | --- > [!WARNING] > Some dependencies could not be looked up. Check the Dependency Dashboard for more information. --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/googleapis/sdk-platform-java). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS40Mi40IiwidXBkYXRlZEluVmVyIjoiMzkuNDIuNCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

Author: renovate-bot

.cloudbuild/library_generation/library_generation.Dockerfile

@@ -15,7 +15,7 @@
 # install gapic-generator-java in a separate layer so we don't overload the image
 # with the transferred source code and jars
 
-FROM docker.io/library/maven:3.9.9-eclipse-temurin-11-alpine@sha256:006d25558f9d5244ed55b5d2bd8eaf34d883e447d0c4b940e67b9f44d21167bf AS ggj-build
+FROM docker.io/library/maven:3.9.9-eclipse-temurin-11-alpine@sha256:cdfb386e8ed1abdc3ee36d43c1e6df0c57042342ea760f5ce10565df1794f3b0 AS ggj-build
 
 WORKDIR /sdk-platform-java
 COPY . .