Update tags for v2.1.0

Author: JonasAlfredsson

docs/dockerhub_tags.md

@@ -17,7 +17,8 @@ are updated.
 
 | Major | Minor | Patch | Nginx              |
 | ----: | ----: | ----: | :----------------- |
-| 2     | 2.0   | 2.0.1 | 2.0.1-nginx1.19.10 |
+| 2     | 2.1   | 2.1.0 | 2.1.0-nginx1.19.10 |
+|       | 2.0   | 2.0.1 | 2.0.1-nginx1.19.10 |
 |       |       | 2.0.0 | 2.0.0-nginx1.19.10 |
 |       |       | 1.3.0 | 1.3.0-nginx1.19.10 |
 |       |       |       | 1.3.0-nginx1.19.9  |