Add Capella

doc.zih.tu-dresden.de/docs/jobs_and_resources/overview.md

@@ -8,7 +8,8 @@ platform for highly scalable, data-intensive and compute-intensive applications
 capabilities for energy measurement and performance monitoring. Therefore provides ideal conditions
 to achieve the ambitious research goals of the users and the ZIH.
 
-The HPC system consists of five clusters with their own
+The HPC system consists of [six clusters](hardware_overview.md)
+with their own
 [Slurm](slurm.md) instances and cluster specific
 login nodes. The clusters share a number of different
 [filesystems](../data_lifecycle/file_systems.md) which enable users to switch between the
@@ -16,7 +17,7 @@ components.
 
 ## Selection of Suitable Hardware
 
-The five clusters [`Barnard`](barnard.md),
+The six clusters `Capella`, [`Barnard`](barnard.md),
 [`Alpha Centauri`](alpha_centauri.md),
 [`Romeo`](romeo.md),
 [`Power9`](power9.md) and