Fix YAML syntax for Python heredoc

kibot-ci.yml

@@ -381,18 +381,14 @@ upload_packages:
     - job: inventree_main
       artifacts: true
   script:
+    - apt-get update && apt-get -y install zip
+    - zip -r Fabrication/All.zip Fabrication/
     - |
-      apt-get update && apt-get -y install zip
-
-      # Create combined zip
-      zip -r Fabrication/All.zip Fabrication/
-
-      # Upload each zip to package registry using Python (curl/wget not available in image)
       for zipfile in $(find Fabrication/ -maxdepth 1 -name '*.zip'); do
         basename=$(basename "$zipfile" .zip)
         url="${PACKAGE_REGISTRY_URL}/${VERSION}/${basename}-${VERSION}.zip"
         echo "Uploading: $zipfile to $url"
-        python3 -c "
+        python3 << EOF
 import urllib.request
 with open('$zipfile', 'rb') as f:
     data = f.read()
@@ -400,7 +396,7 @@ req = urllib.request.Request('$url', data=data, method='PUT')
 req.add_header('JOB-TOKEN', '${CI_JOB_TOKEN}')
 urllib.request.urlopen(req)
 print('Upload complete')
-"
+EOF
       done
   artifacts:
     when: always