ci: don't use spaces in zip file name

.drone.yml

@@ -7,7 +7,7 @@ steps:
       - echo @latest https://dl-cdn.alpinelinux.org/alpine/latest-stable/community >> /etc/apk/repositories
       - apk add racket zip aria2@latest
       - ./build.rkt
-      - cd 'build/Notex 4' && zip -r '../Notex 4.zip' .
+      - cd 'build/Notex 4' && zip -r '../notex4.zip' .
 
   - name: publish
     image: gurken2108/drone-gitea-package
@@ -16,7 +16,7 @@ steps:
       token:
         from_secret: forgejo_token
       version: ${DRONE_TAG}
-      file: "build/Notex 4.zip"
+      file: "build/notex4.zip"
     when:
       event: tag
     depends_on: