Update index.md

Just proposing the change as I will be out that week in September. Let's check once you are back, Ben, as in this case you'd be for two weeks in a row.

docs/index.md

@@ -48,7 +48,7 @@ The rota starts on Friday at 17:30 and finishes on the next Friday too at the sa
 | Ulrich        | 23 May to 29 May 2020 |               |
 | Dabadaba      | 30 May to 05 Jun 2020 |               |
 | Julien        | 06 Jun to 12 Jun 2020 |               |
-| Ben           | 13 Jun to 19 Jun 2020 |               |
+| Dabadaba      | 13 Jun to 19 Jun 2020 |               |
 | Alex          | 20 Jun to 26 Jun 2020 |               |
 | Ulrich        | 27 Jun to 03 Jul 2020 |               |
 | Daniel        | 04 Jul to 10 Jul 2020 |               |
@@ -62,7 +62,7 @@ The rota starts on Friday at 17:30 and finishes on the next Friday too at the sa
 | Julien        | 29 Aug to 04 Sep 2020 |               |
 | Ulrich        | 05 Sep to 11 Sep 2020 |               |
 | Ben           | 12 Sep to 18 Sep 2020 |               |
-| Dabadaba      | 19 Sep to 25 Sep 2020 |               |
+| Ben           | 19 Sep to 25 Sep 2020 |               |
 | Daniel        | 26 Sep to 02 Oct 2020 |               |
 | Alex          | 03 Oct to 09 Oct 2020 |               |
 | Daniel        | 10 Oct to 16 Oct 2020 |               |