chore(deps): update python:3.12 docker digest to 73840b2 (#31321)

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

lib/modules/manager/azure-pipelines/readme.md

@@ -44,7 +44,7 @@ resources:
     - container: linux
       image: ubuntu:24.04
     - container: python
-      image: python:3.12@sha256:fcad5ffb670a9f1edc5cc232b2b321e617aaaae1a22c54242964178e408e0057
+      image: python:3.12@sha256:73840b2eacd375e9ab38d65c5ccca1f98524cabccbdc4f9d0932a55d1967a1ab
 
 stages:
   - stage: StageOne