fix: 修复 Dockerfile 中的标签格式，确保每个标签单独声明

Author: AptS-1547

Dockerfile

@@ -2,17 +2,17 @@ FROM python:3.12.9-alpine3.21
 
 ARG VERSION=1.0.0
 
-LABEL maintainer="AptS-1547 <apts-1547@esaps.net>" \
-      version="${VERSION}" \
-      description="A simple webhook server for GitHub to send events to a OneBot (CQHTTP) bot." \
-      homepage="https://onebot-github-webhook.docs.ecaps.top/" \
-      repository="https://github.com/AptS-1547/onebot-github-webhook" \
-      license="Apache-2.0" \
-      license_url="http://www.apache.org/licenses/LICENSE-2.0"
-
-LABEL org.opencontainers.image.source="https://github.com/AptS-1547/onebot-github-webhook" \
-      org.opencontainers.image.description="A simple webhook server for GitHub to send events to a OneBot (CQHTTP) bot." \
-      org.opencontainers.image.licenses="Apache-2.0"
+LABEL maintainer="AptS-1547 <apts-1547@esaps.net>"
+LABEL version="${VERSION}"
+LABEL description="A simple webhook server for GitHub to send events to a OneBot (CQHTTP) bot."
+LABEL homepage="https://onebot-github-webhook.docs.ecaps.top/"
+LABEL repository="https://github.com/AptS-1547/onebot-github-webhook"
+LABEL license="Apache-2.0"
+LABEL license_url="http://www.apache.org/licenses/LICENSE-2.0"
+
+LABEL org.opencontainers.image.source="https://github.com/AptS-1547/onebot-github-webhook"
+LABEL org.opencontainers.image.description="A simple webhook server for GitHub to send events to a OneBot (CQHTTP) bot."
+LABEL org.opencontainers.image.licenses="Apache-2.0"
 
 WORKDIR /app