[loadgenerator and recommendationservice] Update python base image (#1329)

Author: julianocosta89

CHANGELOG.md

@@ -9,6 +9,8 @@ release.
 
 * [cartservice] update .NET package to 1.7.0 release
   ([#1326](https://github.com/open-telemetry/opentelemetry-demo/pull/1326))
+* [loadgenerator and recommendationservice] Update python base image
+  ([#1329](https://github.com/open-telemetry/opentelemetry-demo/pull/1329))
 
 ## 1.7.1
 

src/loadgenerator/Dockerfile

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 
-FROM python:3.12-slim-bullseye as base
+FROM python:3.12-slim-bookworm as base
 
 FROM base as builder
 RUN apt-get -qq update \

src/recommendationservice/Dockerfile

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 
-FROM python:3.12-slim-bullseye as base
+FROM python:3.12-slim-bookworm as base
 
 #
 # Fetch requirements