fix: content/actions/creating-actions/dockerfile-support-for-github-a…

…ctions.md to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN11-GLIBC-5927133
- https://snyk.io/vuln/SNYK-DEBIAN11-GLIBC-5927133
- https://snyk.io/vuln/SNYK-DEBIAN11-NCURSES-2767191
- https://snyk.io/vuln/SNYK-DEBIAN11-NCURSES-5421197
- https://snyk.io/vuln/SNYK-DEBIAN11-OPENSSL-3368735

content/actions/creating-actions/dockerfile-support-for-github-actions.md

@@ -67,7 +67,7 @@ ENTRYPOINT ["sh", "-c", "echo $GITHUB_SHA"]
 
 ```dockerfile
 # Container image that runs your code
-FROM debian:11.6-slim
+FROM debian:bullseye-20240408-slim
 
 # Copies your code file from your action repository to the filesystem path `/` of the container
 COPY entrypoint.sh /entrypoint.sh