fix: translations/de-DE/content/actions/creating-actions/dockerfile-s…

…upport-for-github-actions.md to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN9-APT-407402
- https://snyk.io/vuln/SNYK-DEBIAN9-GLIBC-356506
- https://snyk.io/vuln/SNYK-DEBIAN9-GLIBC-356851
- https://snyk.io/vuln/SNYK-DEBIAN9-GLIBC-356851
- https://snyk.io/vuln/SNYK-DEBIAN9-LIBGCRYPT20-1297891

translations/de-DE/content/actions/creating-actions/dockerfile-support-for-github-actions.md

@@ -62,7 +62,7 @@ ENTRYPOINT ["sh", "-c", "echo $GITHUB_SHA"]
 ##### Beispiel *Dockerfile*
 ``` 
 # Container-Image, das Deinen Code ausführt
-FROM debian:9.5-slim
+FROM debian:9.13-slim
 
 # Kopiert Deine Code-Datei aus Deinem Aktions-Repository in den Dateisystem-Pfad `/` des Containers
 COPY entrypoint.sh /entrypoint.sh