fix table formatting; clean up Eiger support links

Author: bcumming

docs/clusters/eiger.md

@@ -146,7 +146,7 @@ There are multiple [Slurm partitions][ref-slurm-partitions] on the system:
 * the `low` partition is a low-priority partition, which may be enabled for specific projects at specific times.
 
 | name | max nodes per job | time limit |
-| --   | | --                | -- |
+| --   |  -- | -- |
 | `debug`  | 1    | 30 minutes |
 | `prepost`  | 1    | 30 minutes |
 | `normal` | -    | 24 hours |
@@ -171,7 +171,7 @@ See the Slurm documentation for instructions on how to run jobs on the [AMD CPU
 
 Wednesday mornings 8:00-12:00 CET are reserved for periodic updates, with services potentially unavailable during this time frame. If the batch queues must be drained (for redeployment of node images, rebooting of compute nodes, etc) then a Slurm reservation will be in place that will prevent jobs from running into the maintenance window. 
 
-Exceptional and non-disruptive updates may happen outside this time frame and will be announced to the users mailing list, the [CSCS Status Page](https://status.cscs.ch) and the [channel #eiger](https://cscs-users.slack.com/archives/C08FBP55CG1) of the [Users Slack](https://join.slack.com/t/cscs-users/shared_invite/zt-2ozediqzq-eox195xKCWgxt5CZ27LHxA).
+Exceptional and non-disruptive updates may happen outside this time frame and will be announced to the users mailing list, the [CSCS Status Page](https://status.cscs.ch) and the [#eiger channel](https://cscs-users.slack.com/archives/C08FBP55CG1) of the [CSCS User Slack][ref-get-in-touch].
 
 ### Change log