fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-SQLITE3-6139924
- https://snyk.io/vuln/SNYK-DEBIAN12-GNUTLS28-8705121
- https://snyk.io/vuln/SNYK-DEBIAN12-LIBTASN16-8689970
- https://snyk.io/vuln/SNYK-DEBIAN12-SHADOW-5879156
- https://snyk.io/vuln/SNYK-DEBIAN12-SHADOW-5879156

Author: snyk-bot

Dockerfile

@@ -1,5 +1,5 @@
 # Container image that runs your code
-FROM python:3.13.0rc2-slim
+FROM python:3.13.5-slim
 
 # Copies your code file from your action repository to the filesystem path `/` of the container
 COPY entrypoint.sh /entrypoint.sh