Updated readme [ci skip]

Author: UnderGreen

README.md

@@ -15,7 +15,7 @@ MongoDB support matrix:
 | Ubuntu 14.04 | :no_entry: | :white_check_mark:| :white_check_mark:| :white_check_mark:|
 | Ubuntu 16.04 | :no_entry: | :white_check_mark:| :white_check_mark:| :white_check_mark:|
 | Debian 8.x | :no_entry: | :white_check_mark:| :white_check_mark:| :white_check_mark:|
-| Debian 9.x | :no_entry: | :white_check_mark:| :x:| :x:|
+| Debian 9.x | :no_entry: | :white_check_mark:| :x:| :white_check_mark:|
 | RHEL 6.x | :no_entry: | :white_check_mark: | :white_check_mark: | :white_check_mark:|
 | RHEL 7.x | :no_entry: | :white_check_mark: | :white_check_mark: | :white_check_mark:|