fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-LIBTASN16-8689970
- https://snyk.io/vuln/SNYK-DEBIAN12-ZLIB-6008963
- https://snyk.io/vuln/SNYK-DEBIAN12-KRB5-8679228
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-8658672
- https://snyk.io/vuln/SNYK-DEBIAN12-OPENSSL-8648323

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.9-slim as base
+FROM python:3.13.2-slim as base
 
 ENV \
     # Keeps Python from generating .pyc files in the container