Update Python base images to use 'slim-trixie' (#1448)

Author: gfinol

runtime/aws_lambda/Dockerfile

@@ -1,17 +1,17 @@
 # Python 3.6
-#FROM python:3.6-slim-buster
+#FROM python:3.6-slim-trixie
 
 # Python 3.7
-#FROM python:3.7-slim-buster
+#FROM python:3.7-slim-trixie
 
 # Python 3.8
-#FROM python:3.8-slim-buster
+#FROM python:3.8-slim-trixie
 
 # Python 3.9
-#FROM python:3.9-slim-buster
+#FROM python:3.9-slim-trixie
 
 # Python 3.10
-FROM python:3.10-slim-buster
+FROM python:3.10-slim-trixie
 
 RUN apt-get update \
     # Install aws-lambda-cpp build dependencies
@@ -61,4 +61,4 @@ RUN unzip lithops_lambda.zip \
 # Put your dependencies here, using RUN pip install... or RUN apt install...
 
 ENTRYPOINT [ "/usr/local/bin/python", "-m", "awslambdaric" ]
-CMD [ "handler.entry_point.lambda_handler" ]
+CMD [ "handler.entry_point.lambda_handler" ]