deps: update docker.io/library/python:3.13.1-alpine3.20 docker digest to 7788ec8 (#3586)

This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | docker.io/library/python | final | digest | `9ab3b6e` -> `7788ec8` | --- > [!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:eyJjcmVhdGVkSW5WZXIiOiIzOS4xMjUuMSIsInVwZGF0ZWRJblZlciI6IjM5LjEyNS4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Author: renovate-bot

.cloudbuild/library_generation/library_generation.Dockerfile

@@ -47,7 +47,7 @@ RUN git checkout "${GLIB_MUS_SHA}"
 RUN chmod a+x compile-x86_64-alpine-linux.sh
 RUN sh compile-x86_64-alpine-linux.sh
 
-FROM docker.io/library/python:3.13.1-alpine3.20@sha256:9ab3b6ef4afb7582afaa84e97d40a36f192595bb0578561c282cecc22a45de49 as final
+FROM docker.io/library/python:3.13.1-alpine3.20@sha256:7788ec80bdacc4736a50adce4c3711581e83650a8895c6dbf202caf4af7a3270 as final
 
 ARG OWLBOT_CLI_COMMITTISH=0a12b5d22a1ee0975dae8142d61c828ea74508e4
 ARG PROTOC_VERSION=25.5