chore(ci): migrate GH workflows

Signed-off-by: Jan Kowalleck <jan.kowalleck@gmail.com>

Author: jkowalleck

.github/workflows/cibuild.yml

@@ -36,12 +36,12 @@ jobs:
         cd docgen/xml
         ./gen.sh
     - name: Archive JSON Schema documentation
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: JSON-Schema-documentation
         path: docgen/json/docs
     - name: Archive XML Schema documentation
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: XML-Schema-documentation
         path: docgen/xml/docs