Merge pull request #5218 from arangodb-helper/new_arangodb_version_3.3.21

Please upgrade to the ArangoDB Release 3.3.21

library/arangodb

@@ -5,8 +5,8 @@
 2.8.11: https://github.com/arangodb/arangodb-docker@d6fca9a137cd21345b1d380fc0e72daacb6130ce jessie/2.8.11
 3.2: https://github.com/arangodb/arangodb-docker@b4c22ad8bf4facbbc7c3b24e985251a09fcdbcec stretch/3.2.17
 3.2.17: https://github.com/arangodb/arangodb-docker@b4c22ad8bf4facbbc7c3b24e985251a09fcdbcec stretch/3.2.17
-3.3: https://github.com/arangodb/arangodb-docker@9bd89a782c6e814d4529403d66fbce59758e95a2 stretch/3.3.20
-3.3.20: https://github.com/arangodb/arangodb-docker@9bd89a782c6e814d4529403d66fbce59758e95a2 stretch/3.3.20
+3.3: https://github.com/arangodb/arangodb-docker@c77fa2b9bca45deb37e2a709dead1147541857ba stretch/3.3.21
+3.3.21: https://github.com/arangodb/arangodb-docker@c77fa2b9bca45deb37e2a709dead1147541857ba stretch/3.3.21
 3.4: https://github.com/arangodb/arangodb-docker@c98889cf79d8cdeaf56cdedb0c8748ca434f1094 alpine/3.4.1
 3.4.1: https://github.com/arangodb/arangodb-docker@c98889cf79d8cdeaf56cdedb0c8748ca434f1094 alpine/3.4.1
 latest: https://github.com/arangodb/arangodb-docker@c98889cf79d8cdeaf56cdedb0c8748ca434f1094 alpine/3.4.1