add continueOnError for AUTHORS check

Author: basnijholt

azure-pipelines.yml

@@ -32,3 +32,4 @@ jobs:
       MISSING_AUTHORS=$(git shortlog -s HEAD | sed -e "s/^[0-9\t ]*//"| xargs -i sh -c 'grep -q "{}" AUTHORS.md || echo "{} missing from authors"')
       if [ ! -z "$MISSING_AUTHORS" ]; then { echo $MISSING_AUTHORS; exit 1; }; fi
     displayName: 'Authors check'
+    continueOnError: true