Update metadata LABELs in Dockerfile

Author: webknjaz

Dockerfile

@@ -1,8 +1,8 @@
 FROM python:3.7-slim
 
-LABEL "maintainer"="Sviatoslav Sydorenko <wk+re-actors@sydorenko.org.ua>"
-LABEL "repository"="https://github.com/re-actors/gh-action-pypi-publish"
-LABEL "homepage"="https://github.com/re-actors/gh-action-pypi-publish"
+LABEL "maintainer" "Sviatoslav Sydorenko <wk+pypa@sydorenko.org.ua>"
+LABEL "repository" "https://github.com/pypa/gh-action-pypi-publish"
+LABEL "homepage" "https://github.com/pypa/gh-action-pypi-publish"
 
 ENV PYTHONDONTWRITEBYTECODE 1
 ENV PYTHONUNBUFFERED 1