added german version to CI pipeline

.gitlab-ci.yml

@@ -7,8 +7,10 @@ job_build:
     - apt update
     - apt install -y --no-install-recommends asciidoctor
     - gem install asciidoctor-pdf --pre
-    - asciidoctor-pdf guide.adoc
+    - asciidoctor-pdf -o angelguide_en.pdf guide.adoc
+    - asciidoctor-pdf -a lang=de -o angelguide_de.pdf guide.adoc
   artifacts:
     paths:
-      - "guide.pdf"
+      - "angelguide_en.pdf"
+      - "angelguide_de.pdf"
     expire_in: 12 month
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