deps: update docker.io/library/python docker tag to v3.13.2 (#3615)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| docker.io/library/python | final | patch | `3.13.1-alpine3.20` ->
`3.13.2-alpine3.20` |

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.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@sha256:7788ec80bdacc4736a50adce4c3711581e83650a8895c6dbf202caf4af7a3270 as final
+FROM docker.io/library/python:3.13.2-alpine3.20@sha256:816feb29731cdee64b15b0ae91dd9f1cbc36765984ff8ea85a3d90f064417237 as final
 
 ARG OWLBOT_CLI_COMMITTISH=35eff2ce0e72dba6df7fd785779350f33c36692d
 ARG PROTOC_VERSION=25.5