Add Content-Type header to file upload in CI pipeline

The "Content-Type: application/zip" header was added to the curl command in the GitLab CI pipeline.

.gitlab-ci.yml

@@ -115,7 +115,7 @@ create_release:
   script:
     - echo "Creating release and attaching tutorials.zip..."
     - echo "Using tag $CI_COMMIT_REF_NAME"
-    - 'curl --header "PRIVATE-TOKEN: $CI_JOB_TOKEN" --upload-file tutorials.zip "$CI_API_V4_URL/projects/$CI_PROJECT_ID/uploads" > upload_response.json'
+    - 'curl --header "PRIVATE-TOKEN: $CI_JOB_TOKEN" -header "Content-Type: application/zip" --upload-file tutorials.zip "$CI_API_V4_URL/projects/$CI_PROJECT_ID/uploads" > upload_response.json'
     - cat upload_response.json
     - 'UPLOAD_URL=$(jq -r ".url" upload_response.json)'
     - 'if [ -z "$UPLOAD_URL" ] || [ "$UPLOAD_URL" = "null" ]; then echo "Error: Unable to extract upload URL!" && cat upload_response.json && exit 1; fi'