updating Dockerfile for linter

.github/workflows/super-linter.yml

@@ -46,3 +46,4 @@ jobs:
         env:
           VALIDATE_ALL_CODEBASE: false
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          VALIDATE_PYTHON_BLACK: true

Dockerfile

@@ -1,9 +1,8 @@
 FROM python:3-alpine
 
-LABEL version="2.0"
+LABEL version="2.1"
 LABEL description="LDAP Team Sync for GitHub"
-
-MAINTAINER GitHub Services <services@github.com>
+LABEL maintainer="GitHub Services <services@github.com>"
 
 COPY . /opt/github-team-sync
 WORKDIR /opt/github-team-sync