Update Sidecar requirements documentation. (#1100)

* Update sidecar requirements to reflect Graylog2/collector-sidecar#391.

* Fix sidecar version in requirements matrix.

* Update versions in matrix for clarity.

(cherry picked from commit 5045588)

pages/sidecar.rst

@@ -28,15 +28,17 @@ You can get .deb and .rpm packages for Graylog Sidecar in our package repository
 
 Please follow the version matrix to pick the right package:
 
-+-----------------+----------------------------------+
-| Sidecar version | Graylog server version           |
-+=================+==================================+
-| 1.0.x           | 3.0.x,3.1.x,3.2.x                |
-+-----------------+----------------------------------+
-| 0.1.x           | 2.2.x,2.3.x,2.4.x,2.5.x,3.0.x    |
-+-----------------+----------------------------------+
-| 0.0.9           | 2.1.x                            |
-+-----------------+----------------------------------+
++-------------------+-----------------------------------+
+| Sidecar version   | Graylog server version            |
++===================+===================================+
+| 1.1.x             | 3.2.5 or higher                   |
++-------------------+-----------------------------------+
+| 1.0.x             | 3.0 or higher                     |
++-------------------+-----------------------------------+
+| 0.1.x             | 2.2.x,2.3.x,2.4.x,2.5.x,3.0.x     |
++-------------------+-----------------------------------+
+| 0.0.9             | 2.1.x                             |
++-------------------+-----------------------------------+
 
 All following commands should be executed on the **remote machine** where you want to collect log data from.